Modelling of three-dimensional particle rebound from an anisotropic rough wall
| Autor: | Olivier Simonin, Darko Radenkovic |
|---|---|
| Přispěvatelé: | Centre National de la Recherche Scientifique - CNRS (FRANCE), Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE), Université Toulouse III - Paul Sabatier - UT3 (FRANCE), University of Belgrade (SERBIA), Institut de Mécanique des Fluides de Toulouse - IMFT (Toulouse, France), University of Belgrade [Belgrade], Institut de mécanique des fluides de Toulouse (IMFT), Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées |
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
wall collisions
Stochastic modelling 020209 energy General Chemical Engineering Mécanique des fluides Virtual wall 02 engineering and technology Surface finish Shadow effect 01 natural sciences 010305 fluids & plasmas [SPI.MECA.MEFL]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Fluids mechanics [physics.class-ph] Physics::Fluid Dynamics 0103 physical sciences Deterministic simulation 0202 electrical engineering electronic engineering information engineering Surface roughness Multiple particle Anisotropy Physics Anisotropic rough wall Isotropy Three-dimensional particle rebound Mechanics Transverse plane Particle |
| Zdroj: | Powder Technology Powder Technology, Elsevier, 2021, 393, pp.165-183. ⟨10.1016/j.powtec.2021.07.055⟩ |
| ISSN: | 0032-5910 |
| DOI: | 10.1016/j.powtec.2021.07.055⟩ |
| Popis: | International audience; 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. |
| Databáze: | OpenAIRE |
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