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Two computational models for simulating the tumbling motion of elongated particles in fluids
KTH, School of Engineering Sciences (SCI), Mathematics (Dept.), Numerical Analysis, NA.ORCID iD: 0000-0002-8998-985X
2016 (English)In: Computers & Fluids, ISSN 0045-7930, E-ISSN 1879-0747, Vol. 127, 17-35 p.Article in journal (Refereed) PublishedText
Abstract [en]

Suspensions with fiber-like particles in the low Reynolds number regime are modeled by two different approaches that both use a Lagrangian representation of individual particles. The first method is the well-established formulation based on Stokes flow that is formulated as integral equations. It uses a slender body approximation for the fibers to represent the interaction between them directly without explicitly computing the flow field. The second is a new technique using the 3D lattice Boltzmann method on parallel supercomputers. Here the flow computation is coupled to a computational model of the dynamics of rigid bodies using fluid-structure interaction techniques. Both methods can be applied to simulate fibers in fluid flow. They are carefully validated and compared against each other, exposing systematically their strengths and weaknesses regarding their accuracy, the computational cost, and possible model extensions.

Place, publisher, year, edition, pages
Elsevier, 2016. Vol. 127, 17-35 p.
Keyword [en]
Fluid-particle interaction, Lattice Boltzmann method, Slender body formulation, Tumbling fibers
National Category
Fluid Mechanics and Acoustics
Identifiers
URN: urn:nbn:se:kth:diva-180901DOI: 10.1016/j.compfluid.2015.12.010ISI: 000370995700002ScopusID: 2-s2.0-84953242466OAI: oai:DiVA.org:kth-180901DiVA: diva2:899297
Note

QC 20160201

Available from: 2016-02-01 Created: 2016-01-25 Last updated: 2016-03-23Bibliographically approved

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Gustavsson, Katarina
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Numerical Analysis, NA
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