Journal Article

PreJuSER-58629

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Relevance of angular momentum conservation in mesoscale hydrodynamics simulations

Götze, I.FZJ* ; Noguchi, H.FZJ* ; Gompper, G.FZJ*

2007
APS College Park, Md.

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Please use a persistent id in citations: http://hdl.handle.net/2128/9239  doi:10.1103/PhysRevE.76.046705

Abstract: The angular momentum is conserved in fluids with a few exceptions such as ferrofluids. However, it can be violated locally in fluid simulations to reduce computational costs. The effects of this violation are investigated using a particle-based simulation method, multiparticle collision dynamics, which can switch on or off angular-momentum conservation. To this end, we study circular Couette flows between concentric and eccentric cylinders, where nonphysical torques due to the lack of the angular-momentum conservation are found whereas the velocity field is not affected. In addition, in simulations of fluids with different viscosities in contact and star polymers in solvent, incorrect angular velocities occur. These results quantitatively agree with the theoretical predictions based on the macroscopic stress tensor.

Keyword(s): J

Note: Record converted from VDB: 12.11.2012

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Contributing Institute(s):

1. Theorie der Weichen Materie und Biophysik (IFF-2)

Research Program(s):

1. Kondensierte Materie (P54)

Appears in the scientific report 2007

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