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Title: Automatic determination of coupling time step and region in unresolved DEM-CFD
Authors: Wang, M.
Liu, J. B.
Wang, X. F.
Yan, X. L.
Yao, Liming
Yue, Q. B.
Keywords: Engineering::Mechanical engineering
Issue Date: 2022
Source: Wang, M., Liu, J. B., Wang, X. F., Yan, X. L., Yao, L. & Yue, Q. B. (2022). Automatic determination of coupling time step and region in unresolved DEM-CFD. Powder Technology, 400, 117267-.
Journal: Powder Technology
Abstract: When unresolved CFD-DEM is used in coupling calculation, both fluid flow field and particles dynamic both are in time and space domains solves. The coupling time step (coupling number) and coupling region (CFD solution domain) directly affect calculation accuracy and efficiency. Therefore, through real-time update of coupling conditions, establishment of CFD global as well as sub-domain solution technology, we proposed a calculation method for automatically determining the coupling time step and region. Our proposed strategy reduced the solution scale of the fluid domain during coupling, controlled coupling calculation accuracy, and improved calculation efficiency. The calculation revealed that maximum errors of displacement and velocity of single particle settling motion in a finite fluid were 6.2% and 7.1%, respectively, while maximum efficiency was improved by 44.4%. The maximum error reached 3.9%, when the velocity of particles in the pipe was 3.5 m/s. Computational efficiency increased by 26.1%.
ISSN: 0032-5910
DOI: 10.1016/j.powtec.2022.117267
Rights: © 2022 Elsevier B.V. All rights reserved.
Fulltext Permission: none
Fulltext Availability: No Fulltext
Appears in Collections:MAE Journal Articles

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