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Two computational models for simulating the tumbling motion of elongated particles in fluids
KTH, Skolan för teknikvetenskap (SCI), Matematik (Inst.), Numerisk analys, NA.ORCID-id: 0000-0002-8998-985X
2016 (engelsk)Inngår i: Computers & Fluids, ISSN 0045-7930, E-ISSN 1879-0747, Vol. 127, s. 17-35Artikkel i tidsskrift (Fagfellevurdert) Published
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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.

sted, utgiver, år, opplag, sider
Elsevier, 2016. Vol. 127, s. 17-35
Emneord [en]
Fluid-particle interaction, Lattice Boltzmann method, Slender body formulation, Tumbling fibers
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URN: urn:nbn:se:kth:diva-180901DOI: 10.1016/j.compfluid.2015.12.010ISI: 000370995700002Scopus ID: 2-s2.0-84953242466OAI: oai:DiVA.org:kth-180901DiVA, id: diva2:899297
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QC 20160201

Tilgjengelig fra: 2016-02-01 Laget: 2016-01-25 Sist oppdatert: 2022-06-23bibliografisk kontrollert

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Gustavsson, Katarina

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