Change search
Refine search result
1 - 39 of 39
CiteExportLink to result list
Permanent link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Rows per page
  • 5
  • 10
  • 20
  • 50
  • 100
  • 250
Sort
  • Standard (Relevance)
  • Author A-Ö
  • Author Ö-A
  • Title A-Ö
  • Title Ö-A
  • Publication type A-Ö
  • Publication type Ö-A
  • Issued (Oldest first)
  • Issued (Newest first)
  • Created (Oldest first)
  • Created (Newest first)
  • Last updated (Oldest first)
  • Last updated (Newest first)
  • Disputation date (earliest first)
  • Disputation date (latest first)
  • Standard (Relevance)
  • Author A-Ö
  • Author Ö-A
  • Title A-Ö
  • Title Ö-A
  • Publication type A-Ö
  • Publication type Ö-A
  • Issued (Oldest first)
  • Issued (Newest first)
  • Created (Oldest first)
  • Created (Newest first)
  • Last updated (Oldest first)
  • Last updated (Newest first)
  • Disputation date (earliest first)
  • Disputation date (latest first)
Select
The maximal number of hits you can export is 250. When you want to export more records please use the Create feeds function.
  • 1.
    Dahlkild, Anders
    KTH, School of Engineering Sciences (SCI), Mechanics. KTH, School of Engineering Sciences (SCI), Centres, Linné Flow Center, FLOW.
    Finite wavelength selection for the linear instability of a suspension of settling spheroids2011In: Journal of Fluid Mechanics, ISSN 0022-1120, E-ISSN 1469-7645, Vol. 689, p. 183-202Article in journal (Refereed)
    Abstract [en]

    The instability of an initially homogeneous suspension of spheroids, settling due to gravity, is reconsidered. For non-spherical particles, previous studies in the literature report that normal-mode density perturbations of maximum growth rate are those of arbitrarily large, horizontal wavelength. Using the 'mixture theory' for two-phase flow we show that the maximum growth rate for horizontal density perturbations is obtained for a finite wavelength if the inertia of the bulk motion associated with the normal-mode density perturbation is accounted for. We find that for long wavelengths, lambda -> infinity, the growth rate approaches zero as lambda(-2/3). The maximum growth rate is obtained for lambda similar to d/root alpha(0)Re(L)(1/2), where d is the axis perpendicular to the axis of rotational symmetry of the spheroid, alpha(0) is the undisturbed volume fraction of particles and Re(L), typically << 1, is a Reynolds number of the bulk motion on a typical length scale L similar to d/p root alpha(0) and a velocity scale on the order of the undisturbed settling speed. The theoretical results for the wavelength selection agree qualitatively well with previous experimental results in the literature of measured correlation lengths of vertical streamers in settling fibre suspensions.

  • 2. Danielsson, Carl-Ola
    et al.
    Dahlkild, Anders
    KTH, School of Engineering Sciences (SCI), Mechanics.
    Velin, Anna
    Behm, Mårten
    KTH, School of Chemical Science and Engineering (CHE), Chemical Engineering and Technology.
    A Model for the Enhanced Water Dissociation On Monopolar Membranes2009In: Electrochimica Acta, ISSN 0013-4686, E-ISSN 1873-3859, Vol. 54, no 11, p. 2983-2991Article in journal (Refereed)
    Abstract [en]

    A model for the enhanced water dissociation that takes place at the solution/membrane interface in electromembrane processes is presented. The mechanisms behind the enhanced water dissociation are poorly understood and therefore a semi-empirical approach is suggested. The enhanced water dissociation is introduced as a heterogeneous surface reaction similar to the well established Butler–Volmer law for electrode reactions. In the model there are two parameters that need to be determined through experiments. A 1D diffusion boundary layer problem is presented and solved in order to show that a sufficient rate of water dissociation can be obtained with the model. The advantage of the presented model is that it can easily be incorporated into simulations of electromembrane processes such as electrodialysis, electrodeionization and electropermutation. The influence of the enhanced water dissociation on these processes can then be studied.

  • 3. Danielsson, Carl-Ola
    et al.
    Dahlkild, Anders
    KTH, School of Engineering Sciences (SCI), Mechanics.
    Velin, Anna
    Behm, Mårten
    KTH, School of Chemical Science and Engineering (CHE), Chemical Engineering and Technology.
    Modeling Continuous Electropermutation with Effects of Water Dissociation Included2010In: AIChE Journal, ISSN 0001-1541, E-ISSN 1547-5905, Vol. 56, no 9, p. 2455-2467Article in journal (Refereed)
    Abstract [en]

    The repeating unit consisting of a cell pair of one concentrate and one feed compartment of an electropermutation stack is modeled. Both the feed and the concentrate compartments are filled with an ion-exchange textile material. Enhanced water dissociation taking place at the surface of the membrane is included in the model as a hetrogeneous surface reaction. Results from simulations of nitrate removal for drinking water production are presented and comparisons with previous experimental results are made. The influence of both conductive and inert textile spacers on the process is investigated via simulations

  • 4.
    Danielsson, Carl-Ola
    et al.
    KTH, School of Engineering Sciences (SCI), Centres, Faxén Laboratory.
    Dahlkild, Anders
    KTH, School of Engineering Sciences (SCI), Centres, Faxén Laboratory.
    Velin, Anna
    Behm, Mårten
    KTH, School of Engineering Sciences (SCI), Centres, Faxén Laboratory.
    Nitrate Removal by Continuous Electropermutation Using Ion-Exchange Textile: I. Modeling2006In: Journal of the Electrochemical Society, ISSN 0013-4651, E-ISSN 1945-7111, Vol. 153, no 4, p. D51-D61Article in journal (Refereed)
    Abstract [en]

    This paper presents a steady-state model of the feed compartment of an electropermutation cell, used for nitrate removal, with ion exchange textiles incorporated as a conducting spacer. In the model the ion-exchange textile is treated as a porous medium and volume averaging is applied to obtain a macrohomogeneous two-phase model. The ion-exchange between the two phases is modeled assuming that the rate-determining step is the mass-transfer resistance on the liquid side of the phase interface. Analysis of the model equations reveals appropriate simplifications. The influence of the governing dimensionless numbers is investigated through simulations based on the model.

  • 5.
    Danielsson, Carl-Ola
    et al.
    KTH, School of Chemical Science and Engineering (CHE), Chemical Engineering and Technology. KTH, School of Engineering Sciences (SCI), Centres, Faxén Laboratory.
    Velin, Anna
    Behm, Mårten
    KTH, School of Chemical Science and Engineering (CHE), Chemical Engineering and Technology. KTH, School of Engineering Sciences (SCI), Centres, Faxén Laboratory.
    Dahlkild, Anders
    KTH, School of Engineering Sciences (SCI), Mechanics. KTH, School of Engineering Sciences (SCI), Centres, Faxén Laboratory.
    Nitrate Removal by Continuous Electropermutation Using Ion-Exchange Textile: II. Experimental Investigation2006In: Journal of the Electrochemical Society, ISSN 0013-4651, E-ISSN 1945-7111, Vol. 153, no 4, p. D62-D67Article in journal (Refereed)
    Abstract [en]

    Water with nitrate concentrations above 100 ppm has been treated with continuous electropermutation which partially substitutes the nitrate with chloride. The performance of a textile anion exchanger as conducting spacer in the feed compartment of an electropermutation cell was investigated. Experiments with and without textile are compared and the influence of the textile is discussed. The process could, using the textile, successfully treat feed water with 105 ppm nitrate to produce a water with less than 25 ppm nitrate. The importance of establishing a good contact between the membranes and the textile spacer was pointed out. The experimental results were compared to model predictions and a good agreement was found.

  • 6.
    Holmqvist, Claes
    et al.
    STFI-Packforsk.
    Dahlkild, Anders
    KTH, School of Engineering Sciences (SCI), Mechanics.
    Consolidation of sheared, strongly flocculated suspensions2008In: AIChE Journal, ISSN 0001-1541, E-ISSN 1547-5905, Vol. 54, no 4, p. 924-939Article in journal (Refereed)
    Abstract [en]

    The concept of a particle concentration dependent yield stress, previously employed in studies of uniaxial consolidation of a flocculated solid phase dispersed in a liquid, is extended to comprise flocculated phase shear strength. The inter-particle stresses are modeled by assuming that the stress state is always located on a yield-surface in stress-space, whose form is adopted from the Cam-clay plasticity theory for the quasistatic consolidation of soil. By treating the time-dependent dewatering of a suspension trapped between a permeable filter and a sliding piston, as well as the asymptotic limit of a cross-flow filtration situation, the differences with respect to the conventional uniaxial models are made apparent, and the effects of the shear stresses on the consolidation process are elucidated. Applying shear is predicted to increase the rate of the drainage process, because of a reduced load bearing capacity of the flocculated phase, and the correspondingly higher pore pressures.

  • 7.
    Holmqvist, Claes
    et al.
    KTH, School of Engineering Sciences (SCI), Mechanics.
    Dahlkild, Anders
    KTH, School of Engineering Sciences (SCI), Mechanics.
    Fibre mat behaviour in twin-wire formers2005Article in journal (Other academic)
  • 8.
    Holmqvist, Claes
    et al.
    KTH, School of Engineering Sciences (SCI), Mechanics.
    Dahlkild, Anders
    KTH, School of Engineering Sciences (SCI), Mechanics.
    Influence of viscous stresses on the sheared consolidation of flocculated suspensions2005Article in journal (Other academic)
  • 9.
    Holmqvist, Claes
    et al.
    KTH, School of Engineering Sciences (SCI), Mechanics.
    Dahlkild, Anders
    KTH, School of Engineering Sciences (SCI), Mechanics.
    Norman, Bo
    STFI-Packforsk.
    A flexible approach for modelling flow in multi-component blade formers2006In: Nordic Pulp & Paper Research Journal, ISSN 0283-2631, E-ISSN 2000-0669, Vol. 21, no 1, p. 73-81Article in journal (Refereed)
    Abstract [en]

    The internal structure of the fibre network constituting a paper is to a dominating extent determined in the forming zone of the paper machine. In this article we present a method for modelling the pressure distributions in blade forming sections, which is commonly considered to be a key quantity of the process. The ambition is to obtain a tool by which the interaction between the different components of blade sections can be studied. It is achieved by defining modules out of which arbitrary sections can be constructed. The modules are solved independently and matched to each other iteratively Keeping the interface between the modules simple provides great flexibility in the modelling. By virtue of a slenderness assumption, the equations governing each module can be reduced to one-dimensional form, hence limiting the computational work and permitting systems of many components to be studied. Dimensionless numbers defining the problem are identified, and the magnitude of the nonlinear effects are estimated. Simulations are presented that illustrate the potential of the method.

  • 10.
    Hyensjö, Marko
    et al.
    KTH, School of Engineering Sciences (SCI), Mechanics.
    Dahlkild, Anders
    KTH, School of Engineering Sciences (SCI), Mechanics.
    A numerical study on mechanical fibre flocculation in a planar contractionManuscript (preprint) (Other academic)
  • 11.
    Hyensjö, Marko
    et al.
    KTH, School of Engineering Sciences (SCI), Mechanics.
    Dahlkild, Anders
    KTH, School of Engineering Sciences (SCI), Mechanics.
    Study of the rotational diffusivity coefficient of fibres in planar contracting flows with varying turbulence levels2008In: International Journal of Multiphase Flow, ISSN 0301-9322, E-ISSN 1879-3533, Vol. 34, no 9, p. 894-903Article in journal (Refereed)
    Abstract [en]

    The Fokker-Planck equation is solved by describing the evolution of a 3D fibre orientation state along a planar contraction. A constant value of the effective rotational diffusion coefficient was determined for four different turbulent flow cases in planar contractions, reported experimentally in the literature. Two hypotheses for the non-dimensional rotational diffusivity are presented, each based on two different turbulent time scales, i.e. the Kolmogorov time scales and the time scale associated with large energy bearing eddies. These hypotheses are dependent on either the Reynolds number, based on the Taylor micro-scale, and/or a non-dimensional fibre length. The hypothesis, based on the assumption of long fibres, L-t/n greater than or similar to 25, compared to the Kolmogorov scale and in the limit of large Re-lambda seems to capture the basic trends presented in the literature. This hypothesis has also the feature of predicting effects of varying fibre length within certain limits. Accordingly, by modeling the variation of turbulent quantities along the contraction in a CFD analysis, local values of rotational diffusivity can be evaluated with the mentioned hypothesis, based on either Kolmogorov time scale or Eulerian integral time scale.

  • 12.
    Hyensjö, Marko
    et al.
    Metso Paper Karlstad AB.
    Dahlkild, Anders
    KTH, School of Engineering Sciences (SCI), Mechanics.
    Krochak, Paul
    University of British Columbia, Vancouver.
    Olson, James
    University of British Columbia, Vancouver.
    Hämäläinen, Jari
    University of Kuopio.
    Modelling the effect of shear flow on fibre orientation anisotropy in a planar contraction2007In: Nordic Pulp & Paper Research Journal, ISSN 0283-2631, E-ISSN 2000-0669, Vol. 22, no 3, p. 376-382Article in journal (Refereed)
    Abstract [en]

    The effect of turbulence generating vanes and its location in a planar contraction on fibre orientation anisotropy was studied by mathematical modelling. We use single phase CFD (Computational Fluid Dynamic) modelling as an input for the fibre orientation dispersion model to study the effect of shear flow and turbulence in an accelerated fluid flow on fibre orientation anisotropy. For different streamlines in the contracting channel, the fibre orientation distribution model is solved, and the fibre orientation anisotropy could be studied along streamlines near the vane wall and vane tip and further away downstream. The boundary layer did decrease the fibre orientation anisotropy both in the plane of paper and in the plane of contraction, i.e the fibres were less oriented. For the outlet profile of the contraction the fibre orientation anisotropy was more effected by the blunt vane tip than the tapered one. Experimental results in the literature were used to validate this modelling approach and a good qualitative agreement was achieved.

  • 13.
    Hyensjö, Marko
    et al.
    KTH, School of Engineering Sciences (SCI), Mechanics.
    Dahlkild, Anders
    KTH, School of Engineering Sciences (SCI), Mechanics.
    Wikström, Tomas
    Metso Paper Sundsvall AB.
    Comparison between Planar and Fully 3D Approaches for the Evolution of Fibre Orientation in the Shear Layers of Planar ContractionsArticle in journal (Other academic)
  • 14.
    Hyensjö, Marko
    et al.
    KTH, School of Engineering Sciences (SCI), Mechanics.
    Dahlkild, Anders
    KTH, School of Engineering Sciences (SCI), Mechanics.
    Wikström, Tomas
    Metso Paper Sundsvall AB.
    Evolution of the Rotational Diffusivity Coefficient of Fibres along the Centreline of Turbulent Planar Contracting FlowsArticle in journal (Other academic)
  • 15.
    Hyensjö, Marko
    et al.
    Metso Paper Karlstad AB, Karlstad, Sweden .
    Dahlkild, Anders
    KTH, School of Engineering Sciences (SCI), Mechanics.
    Wikström, Tomas
    Modelling the Fibre Anisotropy Profile in Shear Layers Leaving a Planar Contraction2010In: Paper Conference and Trade Show 2010, PaperCon 2010: Volume 3, 2010, p. 2320-2353Conference paper (Refereed)
    Abstract [en]

    The fibre orientation state evolution is evaluated by the fully 3D convection-dispersion equation, i.e. the Fokker-Planck equation. This is solved along various streamlines in the contraction with vane inserts so that effects of wakes and boundary layers could be studied across a jet. As an input to the fibre orientation model the turbulent flow field is solved by Computational Fluid Dynamics (CFD) with second-order closure of the turbulence model. Parameter values for the rotational dispersion coefficient of three hypotheses reported in studies are tested for an independent experimental case. After the contraction the anisotropy profile across the flow, has a variation in anisotropy value in different regions, identified as the boundary layer, the undisturbed region and wakes. The numerical result predicts these regions by comparison to the experimental result with the fully 3D approach of the fibre orientation state applied.

  • 16. Hyensjö, Marko
    et al.
    Hämäläinen, Jari P.
    Dahlkild, Anders
    KTH, Superseded Departments, Mechanics.
    Turbulent Dilute Fibre Suspension Flow Modelling In a Sudden Circular Pipe Enlargement2003In: 89th PAPTAC Annual Meeting, Montreal, 2003Conference paper (Other academic)
  • 17.
    Hyensjö, Marko
    et al.
    Metso Paper Inc, PO Box 1014, SE 651 15 Karlstad, Sweden.
    Krochak, Paul
    The Pulp and Paper Centre, Dept. of Mechanical Engineering, University of British Columbia.
    Olson, James
    The Pulp and Paper Centre, Dept. of Mechanical Engineering, University of British Columbia.
    Hämäläinen, Jari
    Department of Applied Physics, University of Kuopio.
    Dahlkild, Anders
    KTH, School of Engineering Sciences (SCI), Mechanics.
    Modelling a Turbulent Dilute Fibre Suspension in a Planar  Contraction: Effect of Vane Types, Vane Position and Wall  Boundary Layer on Fibre Orientation Distribution2004In: Proceedings of the 5th International Conference on Multiphase Flow, ICMF’04  Yokohama, Japan, 2004, no 436Conference paper (Refereed)
    Abstract [en]

    A model of the effect of turbulence generating vanes and its location in a planar contraction for predicting fibre orientation distribution is proposed. Simultaneously with CFD simulations and with experimental data, the non-dimensional rotational dispersion coefficient has been determined for the extended 1D headbox model. Furthermore the behavior of turbulence generating vanes types, i.e. blunt and tapered, and the location of such has been studied. For different streamlines in the contracting channel, the one dimensional fibre orientation distribution model is solved, and the fibre orientation distribution is studied along streamlines near the vane wall and vane tip and further away. The model reveals the effect of the vane tip and the wall boundary layer on fibre orientation distribution. The boundary layer will for both in the plane of paper and in the plane of contraction wider the fibre orientation distributions, i.e the fibres will be less oriented. For the outlet profile of the contraction the fibre orientation distribution will be more effected by the blunt vane tip than the tapered vane tip. The model is validated with experimental results in literature and a good qualitatively agreement was archived.

  • 18.
    Lim, Shyang Maw
    et al.
    KTH, School of Engineering Sciences (SCI), Mechanics, Fluid Physics. KTH, School of Industrial Engineering and Management (ITM), Centres, Competence Center for Gas Exchange (CCGEx).
    Dahlkild, Anders
    KTH, School of Engineering Sciences (SCI), Mechanics. KTH, School of Engineering Sciences (SCI), Centres, Linné Flow Center, FLOW.
    Mihaescu, Mihai
    KTH, School of Industrial Engineering and Management (ITM), Centres, Competence Center for Gas Exchange (CCGEx). KTH, School of Engineering Sciences (SCI), Centres, Linné Flow Center, FLOW. KTH, School of Engineering Sciences (SCI), Mechanics.
    Aerothermodynamics and Exergy Analysis in Radial Turbine With Heat Transfer2018In: Journal of turbomachinery, ISSN 0889-504X, E-ISSN 1528-8900, Vol. 140, no 9, article id 091007Article in journal (Refereed)
    Abstract [en]

    This study was motivated by the difficulties to assess the aerothermodynamic effects of heat transfer on the performance of turbocharger turbine by only looking at the global performance parameters, and by the lack of efforts to quantify the physical mechanisms associated with heat transfer. In this study, we aimed to investigate the sensitivity of performance to heat loss, to quantify the aerothermodynamic mechanisms associated with heat transfer and to study the available energy utilization by a turbocharger turbine. Exergy analysis was performed based on the predicted three-dimensional flow field by detached eddy simulation (DES). Our study showed that at a specified mass flow rate, (1) pressure ratio drop is less sensitive to heat loss as compared to turbine power reduction, (2) turbine power drop due to heat loss is relatively insignificant as compared to the exergy lost via heat transfer and thermal irreversibilities, and (3) a single-stage turbine is not an effective machine to harvest all the available exhaust energy in the system.

  • 19.
    Lim, Shyang Maw
    et al.
    KTH, School of Industrial Engineering and Management (ITM), Centres, Competence Center for Gas Exchange (CCGEx). KTH, School of Engineering Sciences (SCI), Centres, Linné Flow Center, FLOW. KTH, School of Engineering Sciences (SCI), Mechanics, Fluid Physics.
    Dahlkild, Anders
    KTH, School of Engineering Sciences (SCI), Centres, Linné Flow Center, FLOW. KTH, School of Engineering Sciences (SCI), Mechanics, Fluid Physics. KTH, School of Industrial Engineering and Management (ITM), Centres, Competence Center for Gas Exchange (CCGEx).
    Mihaescu, Mihai
    KTH, School of Industrial Engineering and Management (ITM), Centres, Competence Center for Gas Exchange (CCGEx). KTH, School of Engineering Sciences (SCI), Centres, Linné Flow Center, FLOW. KTH, School of Engineering Sciences (SCI), Mechanics, Fluid Physics.
    Aerothermodynamics and exergy analysis of a turbocharger radial turbine integrated with exhaust manifold2018In: Institution of Mechanical Engineers - 13th International Conference on Turbochargers and Turbocharging 2018, 2018Conference paper (Refereed)
    Abstract [en]

    Large temperature gradients are associated with automotive turbocharger and thus the turbine experiences significant heat loss. Currently, the investigation of aerothermodynamic effects as a result of heat loss in turbine is commonly done by looking at the global performance parameters, i.e. pressure ratio and efficiency. This study aims to investigate the aerothermodynamic effects of heat transfer on a radial turbine operating under engine-like pulsating flow condition by identifying and quantifying the loss mechanisms via an exergy-based method using Detached Eddy Simulation data. Major findings with this study are: 1) Although exergy lost via heat transfer and internal irreversibilities could be as much as the turbine power, the drop of turbine power is only 4% as compared to an adiabatic turbine;2) Only about 12% of the available exhaust energy is extracted by the investigated turbine.

  • 20.
    Lim, Shyang Maw
    et al.
    KTH, School of Industrial Engineering and Management (ITM), Centres, Competence Center for Gas Exchange (CCGEx). KTH, School of Engineering Sciences (SCI), Mechanics.
    Dahlkild, Anders
    KTH, School of Engineering Sciences (SCI), Mechanics. KTH, School of Engineering Sciences (SCI), Centres, Linné Flow Center, FLOW.
    Mihaescu, Mihai
    KTH, School of Engineering Sciences (SCI), Mechanics. KTH, School of Industrial Engineering and Management (ITM), Centres, Competence Center for Gas Exchange (CCGEx).
    Influence of Upstream Exhaust Manifold on Pulsatile Turbocharger Turbine Performance2019In: Journal of engineering for gas turbines and power, ISSN 0742-4795, E-ISSN 1528-8919, Vol. 141, no 6Article in journal (Refereed)
    Abstract [en]

    This research was primary motivated by limited efforts to understand the effects of secondary flow and flow unsteadiness on the heat transfer and the performance of a turbocharger turbine subjected to pulsatile flow. In this study, we aimed to investigate the influence of exhaust manifold on the flow physics and the performance of its downstream components, including the effects on heat transfer, under engine-like pulsatile flow conditions. Based on the predicted results by detached eddy simulation (DES), qualitative and quantitative flow fields analyses in the scroll and the rotor's inlet were performed, in addition to the quantification of turbine performance by using the flow exergy methodology. With the specified geometry configuration and exhaust valve strategy, our study showed that (1) the exhaust manifold influences the flow field and the heat transfer in the scroll significantly and (2) although the exhaust gas blow-down disturbs the relative flow angle at rotor inlet, the consequence on the turbine power is relatively small.

  • 21.
    Lim, Shyang Maw
    et al.
    KTH, School of Industrial Engineering and Management (ITM), Centres, Competence Center for Gas Exchange (CCGEx). KTH, School of Engineering Sciences (SCI), Mechanics, Fluid Physics.
    Dahlkild, Anders
    KTH, School of Engineering Sciences (SCI), Centres, Faxén Laboratory. KTH, School of Engineering Sciences (SCI), Centres, Linné Flow Center, FLOW. KTH, School of Engineering Sciences (SCI), Mechanics, Fluid Physics.
    Mihaescu, Mihai
    KTH, School of Industrial Engineering and Management (ITM), Centres, Competence Center for Gas Exchange (CCGEx). KTH, School of Engineering Sciences (SCI), Centres, Linné Flow Center, FLOW. KTH, School of Engineering Sciences (SCI), Mechanics, Fluid Physics. KTH, School of Engineering Sciences (SCI), Mechanics, Fluid Mechanics of Industrial Processes.
    Influence of upstream geometry on pulsatile turbocharger turbine performance2018Report (Other academic)
    Abstract [en]

    This research was primary motivated by limited efforts to understand the effects of secondary flow and flow unsteadiness on the heat transfer and the performance of a turbocharger turbine subjected to pulsatile flow. In this study, we aimed to investigate the influence of exhaust manifold on the flow physics and the performance of its downstream components, including the effects on heat transfer, under engine-like pulsatile flow conditions. Based on the predicted results by Detached Eddy Simulation (DES), qualitative and quantitative flow fields analyses in the scroll and the rotor’s inlet were performed, in addition to the quantification of turbine performance by using the flow exergy methodology. With the specified geometry configuration and exhaust valve strategy, our study showed that 1) The exhaust manifold influences the flow field and the heat transfer in the scroll significantly, and 2) Although the relative inflow angle at the rotor’s inlet is significantly affected by the initial exhaust gas blow down from the exhaust manifold, the consequence on the turbine power is relatively small.

  • 22.
    Lim, Shyang Maw
    et al.
    KTH, School of Engineering Sciences (SCI), Mechanics. KTH, School of Engineering Sciences (SCI), Centres, Linné Flow Center, FLOW. KTH, School of Industrial Engineering and Management (ITM), Centres, Competence Center for Gas Exchange (CCGEx).
    Dahlkild, Anders
    KTH, School of Engineering Sciences (SCI), Mechanics. KTH, School of Engineering Sciences (SCI), Centres, Linné Flow Center, FLOW. KTH, School of Industrial Engineering and Management (ITM), Centres, Competence Center for Gas Exchange (CCGEx).
    Mihaescu, Mihai
    KTH, School of Engineering Sciences (SCI), Mechanics. KTH, School of Engineering Sciences (SCI), Centres, Linné Flow Center, FLOW. KTH, School of Industrial Engineering and Management (ITM), Centres, Competence Center for Gas Exchange (CCGEx).
    Influence of upstream geometry on pulsatile turbocharger turbine performance2018In: Microturbines, Turbochargers, and Small Turbomachines; Steam Turbines, ASME Press, 2018, Vol. 8Conference paper (Refereed)
    Abstract [en]

    Unlike conventional turbomachinery, an automotive turbocharger's turbine is operated under unsteady hot and pulsatile flow due to the inherent nature of reciprocating engine. Although the turbine is integrated with exhaust manifold in real application, some experiments and numerical studies ignore its presence. In this study, we aimed to investigate the effects of upstream complex exhaust manifold on the prediction of pulse flow turbine performance via Detached Eddy Simulation (DES). Heat transfer was incorporated and the exergy based approach was used to quantify the heat transfer associated losses. Our primary results showed that under the investigated turbine stage, although the presence of exhaust manifold influences the prediction of heat transfer and internal irreversibilities in the scroll significantly, it does not significantly affect the prediction of turbine power, heat transfer and irreversibilities at the downstream components.

  • 23.
    Lim, Shyang Maw
    et al.
    KTH, School of Industrial Engineering and Management (ITM), Centres, Competence Center for Gas Exchange (CCGEx).
    Dahlkild, Anders
    KTH, School of Engineering Sciences (SCI), Mechanics. KTH, School of Industrial Engineering and Management (ITM), Centres, Competence Center for Gas Exchange (CCGEx).
    Mihaescu, Mihai
    KTH, School of Engineering Sciences (SCI), Mechanics. KTH, School of Industrial Engineering and Management (ITM), Centres, Competence Center for Gas Exchange (CCGEx).
    Wall Treatment Effects on the Heat Transfer in a Radial Turbine Turbocharger2016In: Springer Proceedings in Physics, Springer Science+Business Media B.V., 2016, p. 439-447Conference paper (Refereed)
    Abstract [en]

    Contradicting results about heat transfer effects on the performance of turbine turbocharger motivated this study. It was aimed to assess the effects that the wall treatment in a numerical sense has on the performance of a radial turbine of automotive turbocharger operating under a continuous flow condition. Adiabatic and non-adiabatic conditions were analyzed by using Unsteady Reynolds Averaged Navier-Stokes (URANS), Large Eddy Simulations (LES) and Detached Eddy Simulations (DES) approaches. When considering heat transfer, heat transfer loss at various locations is highly dependent on the near-wall modelling approach employed. Development of thermal boundary layer in the upstream region of turbine affects how the gas is convected in the downstream components, such as the scroll and the rotor. As long as the deviation in predicting thermal boundary layer does not affect the prediction of gas temperature at the inlet and outlet of the rotor, the difference in turbine power prediction by different near-wall modelling approaches was found to be small.

  • 24.
    Mellgren, Niklas
    et al.
    KTH, School of Engineering Sciences (SCI), Mechanics.
    Vynnycky, Michael
    Dahlkild, Anders
    KTH, School of Engineering Sciences (SCI), Mechanics.
    Porous Electrode and Nonequilibrium Water Transport Modelling in Polymer Electrolyte Fuel CellsManuscript (preprint) (Other academic)
    Abstract [en]

    Recent years have seen the appearance of numerous modelling studies of the polymer electrolyte fuel cell. However, in spite of observations in different studies that a model for a cell operating under single-phase conditions must include nonequilibrium water transport and must spatially resolve the porous electrodes in order to capture the behaviour of the cell correctly, there are only very few models in the literature that simultaneously do both. This paper, however, formulates such a model and considers a one-dimensional version of it in a parameter study. In future work, the model will be used to calibrate model parameters against experiments and study the operation of cells in higher dimensions.

  • 25. Parsheh, M.
    et al.
    Dahlkild, Anders A.
    KTH, School of Engineering Sciences (SCI), Mechanics.
    Aidun, C. K.
    Advances in design of elastic guiding vanes used in traditional and stratified headboxes2008Conference paper (Refereed)
    Abstract [en]

    We have studied wake of guiding vanes developing in the contracting zone of headbox. It has been found that self-similar solutions can predict the wake characteristics. These predictions can be used in optimization of guiding vanes to improve the mechanical properties of the finished paper. In order to study the mixing in the wake of separating vanes used in multilayer headboxes, we have measured the flow in a model headbox in a wind-tunnel. To quantify mixing, the airflow above the plate was heated and the temperature stratification in the wake was traced by measuring the temperature field using constant current anemometry (CCA). Using different plate lengths, we found that the degree of mixing, obtained at a given position in the straight channel, was quite sensitive to the distance for which the wake had developed in the contraction. For a plate which does not protrude into the straight channel, we demonstrate the existence of an optimal distance from the plate trailing edge to the contraction outlet that results in the lowest possible degree of mixing at a given downstream position in the straight channel. This finding is also supported by a semi-empirical relationship based on our developed self-similar solution for mixing layers in planar contractions and constant cross-section channels.

  • 26. Parsheh, Mehran
    et al.
    Dahlkild, Anders A.
    KTH, School of Engineering Sciences (SCI), Mechanics.
    Evolution of flat-plate wakes in sink flow2009In: Journal of Fluid Mechanics, ISSN 0022-1120, E-ISSN 1469-7645, Vol. 626, p. 241-262Article in journal (Refereed)
    Abstract [en]

    Evolution of flat-plate wakes in sink flow has been studied both analytically and experimentally. For such wakes, a similarity solution is derived which considers simultaneous presence of both laminar and turbulent stresses inside the wake. This solution utilizes an additional Reynolds-stress term which represents the fluctuations similar to those in wall-bounded flows, accounting for the fluctuations originating from the plate boundary layer. In this solution, it is shown that the total stress, the sum of laminar and Reynolds shear stresses, becomes self-similar. To investigate the accuracy of the analytical results, the wake of a flat plate located at the centreline of a planar contraction is studied using hot-wire anemometry. Wakes of both tapered and blunt edges are considered. The length of the plates and the flow acceleration number K = 6.25 x 10(-6) are chosen such that the boundary-layer profiles at the plate edge approach the self-similar laminar solution of Pohlhausen (Z. Angew. Math. Mech., vol. 1, 1921, p. 252). A short plate in which the boundary layer at the edge does not fully relaminarize is also considered. The development of the turbulent diffusivity used in the analysis is determined empirically for each experimental case. We have shown that the obtained similarity solutions, accounting also for the initial conditions in each case, generally agree well with the experimental results even in the near field. The results also show that the mean velocity of the transitional wake behind a tapered edge becomes self-similar almost immediately downstream of the edge.

  • 27. Parsheh, Mehran
    et al.
    Dahlkild, Anders A.
    KTH, School of Engineering Sciences (SCI), Mechanics.
    Mixing Layers in Sink Flow: Effect of Length of Flight on Mixing in a Channel Downstream2009In: Flow Turbulence and Combustion, ISSN 1386-6184, E-ISSN 1573-1987, Vol. 82, no 3, p. 407-433Article in journal (Refereed)
    Abstract [en]

    We have experimentally and analytically studied transport of a passive scalar in the wake of a thin flat plate located at the centerline of a planar contraction with flat walls. The constant Launder parameter in the contraction, K = 6.25 x10 (-aEuro parts per thousand 6), was twice the value required for a turbulent boundary layer to relaminarize. In addition to the mixing analysis inside the contraction, layer mixing is also investigated downstream, where the flow continues inside a constant cross-section channel. In order to generate the passive scalar, the airflow above the plate was heated and the temperature stratification in the wake was traced by measuring the temperature field using constant current anemometry. Using different plate lengths, we found that the degree of mixing, obtained at a given position in the straight channel, is a function of the distance from the plate trailing edge to the contraction outlet. For a plate which does not protrude into the straight channel, we demonstrate the existence of an optimal trailing edge-contraction outlet distance that results in the lowest possible degree of mixing at a given downstream position in the straight channel. This finding is also supported by a semi-empirical relationship based on our developed self-similar solution for mixing layers in planar contractions.

  • 28.
    Prahl Wittberg, Lisa
    et al.
    KTH, School of Engineering Sciences (SCI), Mechanics. KTH, School of Engineering Sciences (SCI), Centres, Linné Flow Center, FLOW.
    Björkman, M.
    Khokhar, Gohar
    KTH, School of Engineering Sciences (SCI), Mechanics.
    Mohlin, U. -B
    Dahlkild, Anders
    KTH, School of Engineering Sciences (SCI), Mechanics. KTH, School of Engineering Sciences (SCI), Centres, Linné Flow Center, FLOW.
    Flow conditions in the grooves of a Low-Consistency refiner2012In: Nordic Pulp & Paper Research Journal, ISSN 0283-2631, E-ISSN 2000-0669, Vol. 27, no 2, p. 173-183Article in journal (Refereed)
    Abstract [en]

    The flow pattern in the grooves plays a major role for the homogeneity of refining as well as for the transfer and loading of fiber flocs in refining position on the bar edges. However, it is an area where very little information is available. In the present study, flow conditions in the grooves in a Low-Consistency (LC) - disc refiner were studied both experimentally and numerically. The experimental study involved high-speed imaging through a 3 cm peephole into a commercial refiner. The Computational Fluid Dynamics (CFD) simulation focused on the flow condition in a radial groove, considering both Newtonian and non-Newtonian flows. Flow conditions for stator and rotor grooves were modeled along the groove at different angular speeds and pressure differences over the refiner. Both the experimental and the modeling results show a dual flow pattern in the grooves; a rotational/spiral movement at the top of the groove and a flow in the direction of the groove at the bottom, which to the authors knowledge has not been reported in literature. The strong vortical motion at the top of the grooves observed both for the rotor and the stator are believed to be important for placing the fibers onto the bar edges and to induce shear forces in such a way that the fibers get treated. Moreover, a large sensitivity to suspension properties in terms of the development of flow pattern was detected.

  • 29.
    Schickhofer, Lukas
    et al.
    KTH, School of Engineering Sciences (SCI), Mechanics.
    Dahlkild, Anders
    KTH, School of Engineering Sciences (SCI), Mechanics.
    Mihaescu, Mihai
    KTH, School of Engineering Sciences (SCI), Mechanics.
    Aeroacoustics of an elastic element in unsteady flow of low Reynolds numbers2016In: AIAA Technical Paper 2016-2700, 22nd AIAA/CEAS Aeroacoustics Conference, American Institute of Aeronautics and Astronautics, 2016, 2016Conference paper (Refereed)
    Abstract [en]

    Vibrations of elastic structures are a common occurrence in numerous fields of engineering such as aeronautics, aerodynamics, civil engineering, and biomechanics. Particular e ort is dedicated to aeroacoustics of elements that are excited to oscillatory behaviour due to fluid instabilities. The current study is concerned with the numerical investigation of the flow-induced vibrations of a flexible, beam-like element in crossflow at low Reynolds numbers of Re = 100 − 1000 by means of fluid-structure interaction simulations. The aeroa-coustics in the near field are assessed with direct computation of the compressible airflow. Additionally, an acoustic analogy is applied, characterising the acoustic sources and the corresponding sound propagation. At low Reynolds numbers and high elastic moduli the dipole source produces the highest pressure perturbation in the near field. At higher Reynolds numbers and low elastic moduli, however, the monopole source due to structural vibrations becomes the important sound generating mechanism.

  • 30.
    Schickhofer, Lukas
    et al.
    KTH, School of Engineering Sciences (SCI), Mechanics.
    Dahlkild, Anders
    KTH, School of Engineering Sciences (SCI), Mechanics.
    Mihaescu, Mihai
    KTH, School of Engineering Sciences (SCI), Mechanics.
    Influence of changes of the glottal waveform on vowel production2017In: Proceedings of Meetings on Acoustics (POMA), Acoustical Society of America, Paper ICA2016-586, 2017, 2017Conference paper (Refereed)
    Abstract [en]

    Conditions of the vocal folds and upper airways can directly influence the fundamental frequency of the periodic movement of the glottis as well as the waveform of the source signal. This could further impair a patient's ability to excite resonances of the vocal tract and generate vowels. In this study, the Rosenberg model for the glottal pulse is applied to numerically investigate the propagation of the voice source signal from the glottis through a static vocal tract model. The geometries of the vocal tract are based on magnetic resonance imaging data for the different vowel pronunciations of a healthy male subject. For the computation of the pressure fluctuations and the associated distribution of frequency peaks as a result of the modulation through the vocal tract, direct compressible flow simulations are carried out by using a finite volume solver. The results are compared with the solution of a wave reflection analogue based on the area functions extracted from the same geometries and good agreement is reached. The effect of variations of glottal closure and fundamental frequency of the standard Rosenberg waveform on the computed acoustic signal is investigated. Thus, an estimation of the impact of glottal diseases on the ability of vowel production is attempted.

  • 31.
    Schickhofer, Lukas
    et al.
    KTH, School of Engineering Sciences (SCI), Mechanics.
    Dahlkild, Anders
    KTH, School of Engineering Sciences (SCI), Mechanics.
    Mihaescu, Mihai
    KTH, School of Engineering Sciences (SCI), Mechanics.
    On direct aeroacoustics calculations of the vocal tract2019In: Direct and Large-Eddy Simulation XI, ERCOFTAC Series, 2019, Vol. 25Conference paper (Refereed)
    Abstract [en]

    Voice production and the verbal expression through speech are crucial components of human communication. The human voice is not just conveying information directly through words, but also indirectly as paralinguistic information such as the speaker's emotional state through tonality.

    As such, voice is generated through a two-part process: First, a source signal is produced by the vocal folds that are pulsating the lung pressure and volumetric flow rate in a particular frequency through periodic opening and closing. Second, the vocal tract causes an attenuation or amplification of this source signal at certain frequencies depending on its specific shape. The voice generation process can therefore be described by a source-filter model with the vocal folds acting as the source and the vocal tract as an acoustic filter. Thus, we are able to produce different vowels and sounds as we manipulate the vocal tract during phonation.

    However, the ability to speak can be compromised due to clinical conditions affecting the opening between the vocal folds (i.e. glottis) or the vocal tract. Certain voice disorders such as partial or total vocal fold paralysis and laryngeal cancer are known to affect the source signal and its waveform considerably.

    Nevertheless, the actual cause-effect relations between physiological changes in the vocal tract and the acoustic pressure in the far field are unclear. In acoustics, the far field is defined as the region away from the source, where sound pressure levels follow the inverse square law and show a decrease of approximately 6 dB for each doubling of the distance from the source.

    An additional factor in voice production is the shedding of intraglottal vortical structures. The sound output generated by vortices becomes important in cases of incomplete glottal closure or paralysed vocal folds. In this study, the acoustic signal generated through speech is computed directly as pressure fluctuations resulting from unsteady large eddy simulations, applied to magnetic resonance imaging (MRI) data. Thus, a time-resolved solution for the acoustic pressure in the upper airways is achieved, contributing to the knowledge of cause-effect relations in phonation and opening up new therapeutic options for vocal tract and airway disorders by the use of computational fluid dynamics.

  • 32. Wedin, R.
    et al.
    Dahlkild, Anders A.
    KTH, Superseded Departments, Mechanics.
    On the transport of small bubbles under developing channel flow in a buoyant gas-evolving electrochemical cell2001In: Industrial & Engineering Chemistry Research, ISSN 0888-5885, E-ISSN 1520-5045, Vol. 40, no 23, p. 5228-5233Article in journal (Refereed)
    Abstract [en]

    A gas-evolving electrochemical cell with natural convection due to buoyancy is modeled using a hydrodynamic two-phase mixture model. Physical parameters are taken from the chlorate process, where hydrogen is evolved at the cathode. Constitutive closure laws, based on empirical relations developed for sedimenting particles, give the motion of the monodisperse gas phase relative to the mixture. Typical results display the effect of bubble size, channel width, and current density on the buoyant flow rate of the electrolyte through the channel. Results from the numerical simulations are also compared to data measured by Boissonneau and Byrne(1) on a cell with gas evolution on both the anode and the cathode. Qualitatively good agreement was found.

  • 33.
    Zhang, Feng
    et al.
    KTH, School of Engineering Sciences (SCI), Mechanics. KTH, School of Engineering Sciences (SCI), Centres, Linné Flow Center, FLOW.
    Dahlkild, Anders A.
    KTH, School of Engineering Sciences (SCI), Mechanics. KTH, School of Engineering Sciences (SCI), Centres, Linné Flow Center, FLOW.
    Gustavsson, Katarina
    KTH, School of Engineering Sciences (SCI), Mathematics (Dept.), Numerical Analysis, NA. KTH, School of Engineering Sciences (SCI), Centres, Linné Flow Center, FLOW.
    Lundell, Fredrik
    KTH, School of Engineering Sciences (SCI), Mechanics. KTH, School of Engineering Sciences (SCI), Centres, Linné Flow Center, FLOW. KTH, School of Chemical Science and Engineering (CHE), Centres, Wallenberg Wood Science Center.
    Near-Wall Convection in a Sedimenting Suspension of Fibers2014In: AIChE Journal, ISSN 0001-1541, E-ISSN 1547-5905, Vol. 60, no 12, p. 4253-4265Article in journal (Refereed)
    Abstract [en]

    The sedimentation of a fiber suspension near a vertical wall is investigated numerically. Initially, the near-wall convection is an upward backflow, which originates from the combined effects of the steric-depleted layer and a hydrodynamically depleted region near the wall. The formation of the hydrodynamically depleted region is elucidated by a convection-diffusion investigation, in which fibers are classified according to the different directions in which they drift. For fibers with sufficiently large aspect ratio, the initial near-wall backflow keeps growing. However, the backflow reverses to downward flow at later times if the aspect ratio is small. This is due to the fiber-wall interactions which rotate fibers to such angles that make fibers drift away from the wall, inducing a dense region and a correspondingly downward flow outside the initial backflow. Moreover, the steric-depleted boundary condition is of secondary importance in the generation and evolution of the near-wall convection.

  • 34.
    Zhang, Feng
    et al.
    KTH, School of Engineering Sciences (SCI), Mechanics. KTH, School of Engineering Sciences (SCI), Centres, Linné Flow Center, FLOW.
    Dahlkild, Anders A.
    KTH, School of Engineering Sciences (SCI), Mechanics. KTH, School of Engineering Sciences (SCI), Centres, Linné Flow Center, FLOW.
    Lundell, Fredrik
    KTH, School of Engineering Sciences (SCI), Mechanics. KTH, School of Engineering Sciences (SCI), Centres, Linné Flow Center, FLOW. KTH, School of Chemical Science and Engineering (CHE), Centres, Wallenberg Wood Science Center.
    Evolution of streamers in sedimentation of fibre suspensions bounded by vertical wallsManuscript (preprint) (Other academic)
    Abstract [en]

    The simulation, based on the Navier-Stokes equations coupled to a transport equation for the PDF of fibres, shows that a series of alternating structures of risers and streamers emerge continuously from the walls until they meet in the middle of the domain. For moderate times, this agrees qualitatively with experimental and theoretical results. Moreover, our simulation in a vessel of infinite height obtained an increasing wavelength evolution due to the congregation of the streamers or risers. In the end, there is constantly only one streamer left, and it drifts randomly to one side of the container until the evolution reaches a steady state. It is also found that the perturbations added to the initial conditions can induce more high density regions which sizes and velocities are strongly linked to the initial perturbations of the number density or the flow field. In addition, the maximum number of streamers increases with Reynolds number, volumefraction and channel width.

  • 35.
    Zhang, Feng
    et al.
    KTH, School of Engineering Sciences (SCI), Mechanics. KTH, School of Engineering Sciences (SCI), Centres, Linné Flow Center, FLOW.
    Dahlkild, Anders A.
    KTH, School of Engineering Sciences (SCI), Mechanics. KTH, School of Engineering Sciences (SCI), Centres, Linné Flow Center, FLOW.
    Lundell, Fredrik
    KTH, School of Engineering Sciences (SCI), Mechanics. KTH, School of Engineering Sciences (SCI), Centres, Linné Flow Center, FLOW. KTH, School of Chemical Science and Engineering (CHE), Centres, Wallenberg Wood Science Center.
    Non-linear disturbance growth during sedimentation in dilute fibre suspensions2013In: Journal of Fluid Mechanics, ISSN 0022-1120, E-ISSN 1469-7645, Vol. 719, p. 268<-294Article in journal (Refereed)
    Abstract [en]

    Disturbances in a dilute fibre suspension is studied with an Eulerian approach. Based on a linear stability analysis, it is shown that inertia and hydrodynamic diffusion damp perturbations at long wavelengths and short wavelengths, respectively, leading to a wavenumber selection. For small, but finite Reynolds number of the fluid bulk motion, the most unstable wavenumber is a finite value which increases with Reynolds number, and where the diffusion narrows the range of unstable wavenumbers. Numerical simulations of the full non-linear evolution in time of a normal mode perturbation show that the induced flow may either die or saturate on a finite amplitude. The character of this long time behaviour is dictated by the wavenumber and the presence or absence of the translational and rotational diffusivities.

  • 36.
    Zhang, Feng
    et al.
    KTH, School of Engineering Sciences (SCI), Mechanics. KTH, School of Engineering Sciences (SCI), Centres, Linné Flow Center, FLOW.
    Gustavsson, Katarina
    Lundell, Fredrik
    KTH, School of Engineering Sciences (SCI), Mechanics. KTH, School of Engineering Sciences (SCI), Centres, Linné Flow Center, FLOW. KTH, School of Chemical Science and Engineering (CHE), Centres, Wallenberg Wood Science Center.
    Dahlkild, Anders A.
    KTH, School of Engineering Sciences (SCI), Mechanics. KTH, School of Engineering Sciences (SCI), Centres, Linné Flow Center, FLOW.
    Near-wall convection in a sedimenting suspension of fibresManuscript (preprint) (Other academic)
  • 37.
    Zhang, Feng
    et al.
    KTH, School of Engineering Sciences (SCI), Mechanics. KTH, School of Engineering Sciences (SCI), Centres, Linné Flow Center, FLOW.
    Lundell, Fredrik
    KTH, School of Engineering Sciences (SCI), Mechanics. KTH, School of Engineering Sciences (SCI), Centres, Linné Flow Center, FLOW. KTH, School of Chemical Science and Engineering (CHE), Centres, Wallenberg Wood Science Center.
    Dahlkild, Anders A.
    KTH, School of Engineering Sciences (SCI), Mechanics. KTH, School of Engineering Sciences (SCI), Centres, Linné Flow Center, FLOW.
    Effects of walls and perturbations on the sedimentation in fibre suspensionsManuscript (preprint) (Other academic)
  • 38.
    Zhang, Feng
    et al.
    KTH, School of Engineering Sciences (SCI), Mechanics. KTH, School of Engineering Sciences (SCI), Centres, Linné Flow Center, FLOW.
    Lundell, Fredrik
    KTH, School of Engineering Sciences (SCI), Mechanics. KTH, School of Engineering Sciences (SCI), Centres, Linné Flow Center, FLOW. KTH, School of Chemical Science and Engineering (CHE), Centres, Wallenberg Wood Science Center.
    Dahlkild, Anders A.
    KTH, School of Engineering Sciences (SCI), Mechanics. KTH, School of Engineering Sciences (SCI), Centres, Linné Flow Center, FLOW.
    Nonlinear interactions of multiple modes and spectral analysis of a suspension of settling fibresManuscript (preprint) (Other academic)
  • 39.
    Zhang, Feng
    et al.
    KTH, School of Engineering Sciences (SCI), Mechanics. KTH, School of Engineering Sciences (SCI), Centres, Linné Flow Center, FLOW.
    SARDINA, GAETANO
    Dahlkild, Anders A.
    KTH, School of Engineering Sciences (SCI), Mechanics. KTH, School of Engineering Sciences (SCI), Centres, Linné Flow Center, FLOW.
    Lundell, Fredrik
    KTH, School of Engineering Sciences (SCI), Mechanics. KTH, School of Engineering Sciences (SCI), Centres, Linné Flow Center, FLOW. KTH, School of Chemical Science and Engineering (CHE), Centres, Wallenberg Wood Science Center.
    Brandt, Luca
    Numerical simulations of the sedimentationin dilute fibre suspensions2013Conference paper (Other academic)
1 - 39 of 39
CiteExportLink to result list
Permanent link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf