MODELING OF DYNAMICS, HEAT-TRANSFER, AND COMBUSTION IN 2-PHASE TURBULENT FLOWS .1. ISOTHERMAL FLOWS

This paper presents a review of authors' collective works in the field of two-phase flow modeling done in the past few decades. The paper is aimed at the construction of mathematical models for simulation of pa rticle-laden turbulent flows. A kinetic equation was obtained for the probability density function (PDF) of the particle velocity distributi on in turbulent flows. The proposed kinetic equation describes both th e interaction of particles with turbulent eddies of the carrier phase and particle-particle collisions. This PDF equation is used for the de rivation of different schemes describing turbulent momentum transfer i n the dispersed particle phase. The turbulent characteristics of the g aseous phase are calculated on the basis of the k-epsilon turbulence m odel with a modulation effect of particles on the turbulence. The cons tructed models have been applied to the calculation of various two-pha se gas-particle turbulent flows in jets and channels as well as partic le deposition in tubes and separators. For validating the theoretical and numerical results, a wide range of comparisons with experimental d ata from Russian and foreign sources has been done. (C) Elsevier Scien ce Inc., 1997.