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Large Eddy Simulation of particle-laden turbulent channel flows with isotropic or non-isotropic wall roughness

Radenkovic, Darko and Fede, Pascal and Simonin, Olivier and Crnojevic, Cvetko Large Eddy Simulation of particle-laden turbulent channel flows with isotropic or non-isotropic wall roughness. (2019) In: 10th International Conference on Multiphase Flow (ICMF 2019), 19 May 2019 - 24 May 2019 (Rio de Janeiro, Brazil). (Unpublished)

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Abstract

In particle-laden flows, particles rebound from rough wall can influence significantly properties of particle and fluid phase which can be important in number of industry processes. 2D stochastic procedures for such a rebound have been developed for representing the effect of wall roughness although such mechanism is generally 3D due to the particle incident velocity and roughness geometry. Therefore we have developed a general approach allowing to represent the 3D particle bouncing on isotropic or non-isotropic rough wall. Thus effect of the isotropic and non-isotropic roughness is evaluated using DPS/LES in horizontal channel flow. Inter-particle collisions are calculated using soft sphere model. Different LES subgrid models of pure fluid flow are examined and influence of subgrid turbulent fluid velocity on particle statistics is evaluated. Detailed information regarding particle velocity statistics are discussed with respect to wall roughness characteristics.

Item Type:Conference or Workshop Item (Paper)
Audience (conference):International conference without published proceedings
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UT3 (FRANCE)
Other partners > University of Belgrade (SERBIA)
Laboratory name:
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Deposited On:14 Oct 2020 13:57

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