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Octree-generated virtual mesh for improved contact resolution in CFD-Dem coupling
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SYSNO ASEP 0560841 Document Type C - Proceedings Paper (int. conf.) R&D Document Type The record was not marked in the RIV Title Octree-generated virtual mesh for improved contact resolution in CFD-Dem coupling Author(s) Studeník, O. (CZ)
Kotouč Šourek, M. (CZ)
Isoz, Martin (UT-L) ORCIDNumber of authors 3 Source Title Topical Problems of Fluid Mechanics 2022. - Praha : Ústav termomechaniky AV ČR, v. v. i., 2022 / Šimurda D. ; Bodnár T. - ISSN 2336-5781 - ISBN 978-80-87012-77-2 Pages s. 151-158 Number of pages 8 s. Publication form Print - P Action Topical problems of fluid mechanics 2022 Event date 16.02.2022 - 18.02.2022 VEvent location Praha Country CZ - Czech Republic Event type EUR Language eng - English Country CZ - Czech Republic Keywords HFDIB-DEM ; CFD ; DEM ; washcoating ; OpenFOAM Subject RIV BK - Fluid Dynamics OECD category Applied mechanics R&D Projects EF15_003/0000493 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Institutional support UT-L - RVO:61388998 DOI 10.14311/TPFM.2022.021 Annotation The present work is focused on improving the efficiency of a computational fluid dynamics (CFD) – discrete element method (DEM) solver allowing for computations with non-spherical solids. In general, the combination of CFD and DEM allows for simulations of freely moving solid particles within a computational domain containing fluid. The standard approach of CFD-DEM solvers is to approximate solid bodies by spheres, the geometry of which can be fully defined via its radius and center position. Consequently, the standard DEM contact models are based on an overlap depth between particles, which can be easily evaluated for a sphere-sphere contact. However, for a contact between two non-spherical particles, the overlap depth cannot be used and has to be replaced by the more general overlap volume. The precision of the overlap volume computation is (i) crucial for the correct evaluation of contact forces, and (ii) directly dependent on the computational mesh resolution. Still, the contact volume evaluation in DEM for arbitrarily shaped bodies is usually by at least one order of magnitude more demanding on the mesh resolution than the CFD. In order to improve the computational efficiency of our CFD-DEM solver, we introduce the concept of an OCTREEbased virtual mesh, in which the DEM spatial discretization is adaptively refined while the CFD mesh remains unchanged. Workplace Institute of Thermomechanics Contact Marie Kajprová, kajprova@it.cas.cz, Tel.: 266 053 154 ; Jana Lahovská, jaja@it.cas.cz, Tel.: 266 053 823 Year of Publishing 2023 Electronic address http://www2.it.cas.cz/fm2015/im/admin/showfile/data/my/Papers/2022/21-TPFM2022.pdf
Number of the records: 1