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Conference Papers Year : 2007

Evaluation of a set of dispersed phase wall boundary conditions in two-fluid modeling

Abstract

The effect of wall roughness is known to be particularly important in confined gas-particle flows, as it leads to irregular particle bouncing and significant momentum redistribution in the wall normal direction. In two-fluid or Eulerian models, the particle-wall interactions need to be described by a set of boundary conditions expressing the second and third-order moments of the particle velocities in order to close the transport equations. In this work, the effect of wall roughness is investigated by defining equivalent friction and restitution coefficients, making it possible to extend the formulation of the dispersed phase boundary conditions as established in the smooth wall case. For the model validation, particle statistics at the wall are computed by simulating a large number of particle-wall impacts with a prescribed distribution of the incident velocity. Then, the proposed boundary conditions are evaluated in the case of a particle-laden channel flow through comparison between Eulerian predictions, Lagrangian predictions and available experimental data.
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Dates and versions

hal-03543268 , version 1 (25-01-2022)

Identifiers

  • HAL Id : hal-03543268 , version 1

Cite

Mohammed Khalij, Saghir Ba Mohammed Sohail, Oesterlé Benoit. Evaluation of a set of dispersed phase wall boundary conditions in two-fluid modeling. international Conference on Multiphase Flow, 2007, Leipzig, Germany. ⟨hal-03543268⟩
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