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A massively parallel CFD/DEM approach for reactive gas-solid flows in complex geometries using unstructured meshes

Dufresne, Yann and Moureau, Vincent and Lartigue, Ghislain and Simonin, Olivier A massively parallel CFD/DEM approach for reactive gas-solid flows in complex geometries using unstructured meshes. (2020) Computers and Fluids, 198. 104402. ISSN 0045-7930

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Official URL: https://doi.org/10.1016/j.compfluid.2019.104402

Abstract

Despite having been thoroughly described in various simple configurations, the study of gas-fluidized systems in a CFD/DEM (Discrete Element Method) formalism becomes challenging as the computational domain size and complexity rise. For a while, attention has been drawn to the design of physical models for fluid-particles interactions, but a recent challenge for numerical tools has been to take advantage from the increasing power of distributed memory machines, in order to simulate realistic industrial systems. Furthermore, unstructured meshes are appealing for their ability to describe complex geometries and to perform local refinements, but lead to significant coding effort involving sophisticated algorithm. In a attempt to design a numerical tool able to cope with these limitations, the methodology presented here proposes an efficient non-blocking algorithm for massive parallelism management, as well as an exhaustive contact scheme to deal with arbitrarily complex geometries, all to be operated on unstructured meshes. The aim is two-fold: (i) To assist larger scale codes in their endeavor to close the solid stress tensor for example, (ii) to pave the way for complex industrial-scale systems modeling using DEM. The methodology is successfully applied to a pilot-scale fluidized bed gathering 9.6M spherical particles and enables to reach interesting physical times using reasonable computational resources.

Item Type:Article
HAL Id:hal-02390009
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)
Other partners > Institut National des Sciences Appliquées de Rouen - INSA (FRANCE)
Other partners > Université de Rouen - UR (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UT3 (FRANCE)
Laboratory name:
Funders:
Agence nationale de la recherche - ANR (FRANCE)
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Deposited On:25 Sep 2020 15:01

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