Forward and backward stochastic Lagrangian trajectory simulation methods for calculation of the mean concentration of scalars and their fluxes for sources arbitrarily distributed in space and time are constructed and justified. Generally, absorption of scalars by medium is taken into account. A...

A two-particle stochastic model of turbulent dispersion in the classical isotropic pseudoturbulence is suggested. The main idea is to describe the relative motion of two particles in small scales by a stochastic differential equation, while the dispersion in large scales is governed by the...

This paper studies a stochastic particle method for the numerical treatment of Smoluchowski's equation governing the coagulation of particles in a host gas. Extensions of the method to the spatially inhomogeneous case are proposed. The coagulation process in an isotropic, fully developed...