Abstract
This chapter presents numerical calculations of dispersed two-phase flows, based on the Euler/Lagrange approach, with special emphasis on two-way coupling and turbulence modification. The Lagrangian consistent terms include the wake-induced turbulence, which influence the continuous phase turbulent variables in a two-phase flow and are essentially evaluated in comparison to those terms arising from the Reynolds-Average procedure that include the standard terms, in three different configurations, namely, axisymmetric particle-laden jet flow, upward pipe flow, and bubble column reactor. It is noted that in all the cases the Lagrangian simulation results are compared with experimental data. Both kinds of source terms provide similar predictions for the first two configurations, but the standard terms totally fail in the third, while the consistent terms give reasonable predictions. Thus, it is concluded that the consistent terms are more general than the standard terms coming from the Reynolds average.
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