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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 20: POSTERS Driven Soft Matter

CPP 20.33: Poster

Wednesday, February 27, 2008, 16:00–18:30, Poster A

Mesoscale hydrodynamics approach to viscoelastic fluids — •Ingo Goetze, Yu-Guo Tao, Hiroshi Noguchi, and Gerhard Gompper — Forschungszentrum Juelich, Juelich, Germany

Multi-particle collision (MPC) dynamics is a well-established, highly efficient particle-based hydrodynamics simulation technique for Newtonian fluids. The standard version of MPC does not conserve angular momentum. However, there are situations, where this leads to non-physical results. Therefore, we have developed a new method with angular momentum conservation.[1] We show that this method has to be employed, for example, to correctly describe circular Couette flow of multiphase fluids.[2]

Moreover, many complex fluids show viscoelastic behaviour. Therefore, an efficient MPC method for viscoelastic fluids is highly desirable. We present such an algorithm, that shows Maxwell fluid behaviour.

[1] H. Noguchi, N. Kikuchi, and G. Gompper, Europhys. Lett. 78, 10005 (2007).

[2] I. O. Götze, H. Noguchi, and G. Gompper, Phys. Rev. E 76, 046705 (2007).

[3] Y-G. Tao, I. O. Götze, and G. Gompper, submitted