Quiet direct simulation of Eulerian fluids

Phys Rev E Stat Nonlin Soft Matter Phys. 2002 May;65(5 Pt 2):055302. doi: 10.1103/PhysRevE.65.055302. Epub 2002 May 22.

Abstract

The direct simulation Monte Carlo method of modeling fluids requires sampling one or more random variables every time step for each particle. In this paper a "quiet Monte Carlo" technique is proposed that eliminates the random sampling and the noise it produces by deterministically generating a small number of computational particles. The technique is applied to particle equations of motion appropriate for modeling an Eulerian fluid. Results indicate that strong one- and two-dimensional shocks with large dynamic ranges are accurately represented with only a few particles per cell.