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DEM-CFD study of flow in a random packed bed
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SYSNO ASEP 0499737 Document Type C - Proceedings Paper (int. conf.) R&D Document Type Conference Paper Title DEM-CFD study of flow in a random packed bed Author(s) Šourek, M. (CZ)
Isoz, Martin (UT-L) ORCIDNumber of authors 2 Source Title Topical Problems of Fluid Mechanics 2018. - Praha : Institue of Thermomechanics AS CR, 2018 / Šimurda D. ; Bodnár T. - ISSN 2336-5781 - ISBN 978-80-87012-65-9 Pages s. 265-272 Number of pages 8 s. Publication form Print - P Action Conference TOPICAL PROBLEMS OF FLUID MECHANICS 2018 Event date 21.02.2018 - 23.02.2018 VEvent location Praha Country CZ - Czech Republic Event type EUR Language eng - English Country CZ - Czech Republic Keywords CFD ; DEM ; random fixed bed ; pressure drop ; 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.2018.036 Annotation Most catalytic surface reactions as well as other industrial applications take advantage of fixed packed bed reactors. Designers of these reactors rely mostly on empirical formulas derived for various simplifying assumptions, e.g. uniformly distributed porosity. The made simplifications and especially the assumption of uniformly distributed porosity fail if the tube to particle diameter ratio goes under 10 and the „wall effect“ becomes more significant. In such a case, the complete three-dimensional structure of the packed bed has to be considered. Thanks to ongoing improvements in numerical mathematics and computational power, the methods of computational fluid dynamics (CFD) have become a great tool for comprehensive description of the packed beds with low tube to particle diameter ratio. Three-dimensional simulations of the flow through two fixed beds differing in the type of the used particle are presented and compared with available experimental and empirical results. To generate the random fixed beds, we propose a custom approach based on the discrete element method (DEM) code implemented in open-source software Blender. Thereafter, OpenFOAM tools (snappyHexMesh, simpleFoam) are used for creation of the computational mesh and solution of the governing equations describing a single-phase flow in the packed bed. 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 2019 Electronic address http://www.it.cas.cz/fm2015/im/admin/showfile/data/my/Papers/2018/36-TPFM2018.pdf
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