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Lattice Boltzmann model for predicting the deposition of inertial particles transported by a turbulent flow

Abstract : Deposition of inertial solid particles transported by turbulent flows is modelled in a framework of a statistical approach based on the particle velocity Probability Density Function (PDF). The particle-turbulence interaction term is closed in the kinetic equation by a model widely inspired from the famous BGK model of the kinetic theory of rarefied gases. A Gauss-Hermite Lattice Boltzmann model is used to solve the closed kinetic equation involving the turbulence effect. The Lattice Boltzmann model is used for the case of the deposition of inertial particles transported by a homogeneous isotropic turbulent flows. Even if the carrier phase is homogeneous and isotropic, the presence of the wall coupled with particle-turbulence interactions leads to inhomogeneous particle distribution and non-equilibrium particle fluctuating motion. Despite these complexities the predictions of the Lattice Boltzmann model are in very good accordance with random-walk simulations. More specifically the mean particle velocity, the r.m.s. particle velocity and the deposition rate are all well predicted by the proposed Lattice Boltzmann model.
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Submitted on : Tuesday, May 31, 2016 - 4:27:04 PM
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Sur le site de l'éditeur il est indiqué "Available online 23 July 2015" : avec un embargo de 12 mois la diffusion est donc possible dès le 23/07/2016




Pascal Fede, Victor Sofonea, Richard Fournier, Stéphane Blanco, Olivier Simonin, et al.. Lattice Boltzmann model for predicting the deposition of inertial particles transported by a turbulent flow. International Journal of Multiphase Flow, Elsevier, 2015, 76, pp.187-197. ⟨10.1016/j.ijmultiphaseflow.2015.07.004⟩. ⟨hal-01321207⟩



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