Multi-particle collision dynamics with a non-ideal equation of state. I

The method of multi-particle collision dynamics (MPCD) and its different implementations are commonly used in the field soft matter physics to simulate fluid flow at micron scale. Typically, coarse-grained particles described by equation state an ideal gas, is rather compressible. This contrast conventional fluids, which incompressible for velocities much below speed sound, can cause inhomogeneities density. We propose algorithm MPCD with a modified rule that results non-ideal significantly decreased compressibility. It allows simulations less computational costs compared algorithms. derive analytic expressions corresponding compressibility as well shear viscosity. They show overall very good agreement simulations, where we determine pressure simulating quiet bulk viscosity linear Poiseuille flow.