Statistical Eulerian Diffusion Approach of Four-Way-Coupled Multiphase Systems

R. Groll

doi:10.4028/www.scientific.net/DDF.297-301.832

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Statistical Eulerian Diffusion Approach of Four-Way-Coupled Multiphase Systems

Abstract:

Volume-fraction weighted and Reynolds averaged momentum transport equations are solved in an Euler/Euler approach to simulate numerically the turbulent, dispersed two- phase °ow in a two-dimensional channel and a three-dimensional conic di®user °ow. Particular attention is given to the modelling of turbulent di®usion and particle wall interaction, assuming local equilibrium but introducing individual terms for particle/°uid drag interaction, particle collisions and trajectory crossings. These in°uences have been quanti¯ed in terms of partial viscosities, a restitution power and a turbulence structure parameter. Boussinesq approxima- tions have been used for each phase and their interaction, whose formulation was provided in the framework of the eddy-viscosity modelling concept.

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Periodical:

Defect and Diffusion Forum (Volumes 297-301)

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832-837

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https://doi.org/10.4028/www.scientific.net/DDF.297-301.832

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Online since:

April 2010

Authors:

R. Groll

Keywords:

Collision, Diffusion, Euler/Euler Approach, Fluidized Bed, Two-Phase Flow

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