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Fifth International Symposium on Turbulence and Shear Flow Phenomena
August, 27-29, 2007, Technische Universität München, Munich, Germany

DOI: 10.1615/TSFP5

TURBULENCE-CHEMISTRY INTERACTIONS IN REACTIVE FLOWS WITH PARTICLE FORMATION

pages 1255-1260
DOI: 10.1615/TSFP5.1960
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ABSTRAKT

This paper discusses phenomena resulting from the interaction of turbulent flow, chemical species transport and particle formation encountered in problems such as soot formation and precipitation from solution. Such problems must be described by a combination of Navier-Stokes equations, scalar transport and reaction, and population balance equations (PBE) for the polydispersed particle phase. The latter was originally studied in a homogeneous environment, and first attempts at simulating flow problems with it assumed a straightforward coupling accomplished through conventional turbulence models within CFD codes. It is shown that this coupling gives rise to complex nonlinear interactions resulting in terms that are unclosed under Reynolds averaging. Subsequently, a transported pdf formulation of the problem is proposed that overcomes these closure problems.

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