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Turbulence and Shear Flow Phenomena -1 First International Symposium

ISBN:
1-56700-135-1 (Print)

MODELING SCALAR MIXING PROCESS IN TURBULENT FLOW

Jacek Pozorski
Institute of Fluid-Flow Machinery, Polish Academy of Sciences, Fiszera 14, 80952 Gdausk, Poland

Jean-Pierre Minier
Laboratoire National d'Hydraulique, Electricite de France 6 quai Watier, 78400 Chatou, France

Abstract

The paper accounts for the work in progress: it addresses some issues concerning scalar mixing models to be implemented in the probability density function (PDF) computation of turbulent flow. Basic notions are briefly recalled; a heuristic model that simulates both the effect of turbulent mixing and molecular diffusion in the physical space is presented. A particle model is then proposed that describes an evolution of scalar variable in its sampling space (in the context of the PDF method). The model satisfies a selection of constraints imposed on the general physical modeling.