Phase segregation via Vlasov-Boltzmann particle dynamics

We introduce a mesoscopic model of phase segregation in binary fluids based on the Vlasov-Boltzmann equations and a particle dynamics computational sc heme that is consistent with these equations. The numerical method is a com bination of DSMC stochastic dynamics for the short range collisions and PIC deterministic evolution for the smooth long range interactions which allow s the simulation of systems with millions of particles. This approach allow s a detailed study of phase segregation kinetics in binary fluids and is ve ry efficient even in the presence of externally imposed fields or hydrodyna mical Rows. (C) 1999 Elsevier Science B.V. All rights reserved.