Constructing thermodynamically consistent models with a non-ideal equation of state

Details Constructing thermodynamically consistent models with a non-ideal equation of state Constructing thermodynamically consistent models with a non-ideal equation of state

2005-11-12

arxiv.org/abs/cond-mat/0511312v1

Math. Comput. Simulat. 72, 232 (2006)

Physics

Condensed Matter

Soft Condensed Matter

6 pages including 4 figures

Scientific paper

A recently introduced particle-based model for fluid dynamics with continuous velocities is generalized to model fluids with excluded volume effects. This is achieved through the use of biased stochastic multi-particle collisions which depend on local velocities and densities and conserve momentum and kinetic energy. The equation of state is derived and criteria for the correct choice of collision probabilities are discussed. In particular, it is shown how a naive implementation can lead to inconsistent density fluctuations.

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