Stochastic Hard-Sphere Dynamics for Hydrodynamics of Non-Ideal Fluids

Details Stochastic Hard-Sphere Dynamics for Hydrodynamics of Non-Ideal Fluids Stochastic Hard-Sphere Dynamics for Hydrodynamics of Non-Ideal Fluids

2008-03-04

arxiv.org/abs/0803.0359v2

Physics

Condensed Matter

Statistical Mechanics

This work performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contra

Scientific paper

10.1103/PhysRevLett.101.075902

A novel stochastic fluid model is proposed with non-ideal structure factor consistent with compressibility, and adjustable transport coefficients. This Stochastic Hard Sphere Dynamics (SHSD) algorithm is a modification of the Direct Simulation Monte Carlo (DSMC) algorithm and has several computational advantages over event-driven hard-sphere molecular dynamics. Surprisingly, SHSD results in an equation of state and pair correlation function identical to that of a deterministic Hamiltonian system of penetrable spheres interacting with linear core pair potentials. The fluctuating hydrodynamic behavior of the SHSD fluid is verified for the Brownian motion of a nano-particle suspended in a compressible solvent.

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