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Modelling of three-dimensional particle rebound from an anisotropic rough wall

Radenkovic, Darko and Simonin, Olivier Modelling of three-dimensional particle rebound from an anisotropic rough wall. (2021) Powder Technology, 393. 165-183. ISSN 0032-5910

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Official URL: https://doi.org/10.1016/j.powtec.2021.07.055

Abstract

In gas-solid confined flows, particle rebound on a rough wall may have a great influence on the macroscopic properties of both phases. Existing simulation methods use simplified approaches where surface roughness is modelled as two-dimensional or isotropic. To improve the accuracy of such simulations, an anisotropic virtual rough wall statistical approach and the corresponding Lagrangian stochastic particle-wall collision model are proposed. From deterministic simulations of the impact of particles on the anisotropic virtual wall given as correlated bi-Gaussian surface, wall-normal vector angle statistics are used for model development. Rebound angle statistics computed from deterministic simulations and using the proposed stochastic model are in very good agreement. Incident particles in vertical planes not collinearwith one of the principal directions of the anisotropic rough surface are bouncing with a mean transverse angle towards the principal direction of lower roughness.

Item Type:Article
HAL Id:hal-03342122
Audience (journal):International peer-reviewed journal
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:
Funders:
Ministry of Education, Science and Technological Development of the Republic of Serbia
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Deposited On:13 Sep 2021 08:56

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