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
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.