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Turbulence Heat and Mass Transfer 6. Proceedings of the Sixth International Symposium On Turbulence Heat and Mass Transfer
September, 14-18, 2009, Rome, Italy

DOI: 10.1615/ICHMT.2009.TurbulHeatMassTransf


ISBN Print: 978-1-56700-262-1

ISSN: 2377-2816

A study of turbulence-chemistry interaction in reactive precipitation via a Population Balance - transported PDF method

page 12
DOI: 10.1615/ICHMT.2009.TurbulHeatMassTransf.1280
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ABSTRAKT

In this paper, the effect of local fluctuations on the Particle Size Distribution (PSD) of particles formed in a turbulent reactive flow is discussed. It is shown that a straightforward RANS approach to problems involving particle nucleation and growth leads to two types of unclosed terms. The first type involves average rates and is similar to unclosed reaction source terms in combustion problems. The second type − the growth number density correlation − is specific to problems involving particle growth and a comprehensive analysis of it has not been attempted so far. A method developed in [1], the population balance − transported PDF method which overcomes the closure problem, is employed here to study the interaction of turbulence with particle formation. The test case is the formation of BaSO,sub>4 crystals by means of reactive precipitation in a tubular reactor. It is shown that this correlation term redistributes and modifies the overall

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