Stochastic Hard-Sphere Dynamics for Hydrodynamics of Non-Ideal Fluids
Abstract
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.
Cite
@article{arxiv.0803.0359,
title = {Stochastic Hard-Sphere Dynamics for Hydrodynamics of Non-Ideal Fluids},
author = {Aleksandar Donev and Berni J. Alder and Alejandro L. Garcia},
journal= {arXiv preprint arXiv:0803.0359},
year = {2009}
}
Comments
This work performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344 (LLNL-JRNL-401745). To appear in Phys. Rev. Lett. 2008