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THMT-12. Proceedings of the Seventh International Symposium On Turbulence Heat and Mass Transfer
September, 24-27, 2012, Palermo, Italy

DOI: 10.1615/ICHMT.2012.ProcSevIntSympTurbHeatTransfPal


ISBN Print: 978-1-56700-302-4

ISSN: 2377-2816

Particle dispersion modelling based on the Generalised Langevin Model for the seen velocity

pages 853-862
DOI: 10.1615/ICHMT.2012.ProcSevIntSympTurbHeatTransfPal.910
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SINOPSIS

In the context of RANS and joint velocity-scalar probability density function (PDF) modelling of single-phase turbulent flows, we recently studied the relation between the Generalised LangevinModel (GLM) and scalar-flux modelling [1, 2]. In the present work, we extend these findings to the modelling of particle dispersion based on a Langevin model for the seen velocity [3, 4]. The new seen-velocity GLM dispersion model is validated on a polydispersed two-phase flow downstreamof a confined bluff body, and the advantages of the new formulation are illustrated by considering the dispersion of tracer particles in a highly turbulent recirculating flow. In case the seen-velocity SLM is used, a modification of the constant C0 is recommended in order to impose the Monin constant value CØ1 = 3 for the linear relaxation of the implied scalar flux model.

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