Automatic determination of coupling time step and region in unresolved DEM-CFD
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 r...
| Main Authors: | , , , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2023
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/164121 |
| _version_ | 1811677975333044224 |
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| author | Wang, M. Liu, J. B. Wang, X. F. Yan, X. L. Yao, Liming Yue, Q. B. |
| author2 | School of Mechanical and Aerospace Engineering |
| author_facet | School of Mechanical and Aerospace Engineering Wang, M. Liu, J. B. Wang, X. F. Yan, X. L. Yao, Liming Yue, Q. B. |
| author_sort | Wang, M. |
| collection | NTU |
| description | 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%. |
| first_indexed | 2024-10-01T02:45:54Z |
| format | Journal Article |
| id | ntu-10356/164121 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T02:45:54Z |
| publishDate | 2023 |
| record_format | dspace |
| spelling | ntu-10356/1641212023-01-05T05:22:59Z Automatic determination of coupling time step and region in unresolved DEM-CFD Wang, M. Liu, J. B. Wang, X. F. Yan, X. L. Yao, Liming Yue, Q. B. School of Mechanical and Aerospace Engineering Engineering::Mechanical engineering Domain Solution Coupled Algorithm 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%. We gratefully acknowledge the financial support from the National Natural Science Foundation of China (11972114, 51904075). 2023-01-05T05:22:59Z 2023-01-05T05:22:59Z 2022 Journal Article 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-. https://dx.doi.org/10.1016/j.powtec.2022.117267 0032-5910 https://hdl.handle.net/10356/164121 10.1016/j.powtec.2022.117267 2-s2.0-85126552616 400 117267 en Powder Technology © 2022 Elsevier B.V. All rights reserved. |
| spellingShingle | Engineering::Mechanical engineering Domain Solution Coupled Algorithm Wang, M. Liu, J. B. Wang, X. F. Yan, X. L. Yao, Liming Yue, Q. B. Automatic determination of coupling time step and region in unresolved DEM-CFD |
| title | Automatic determination of coupling time step and region in unresolved DEM-CFD |
| title_full | Automatic determination of coupling time step and region in unresolved DEM-CFD |
| title_fullStr | Automatic determination of coupling time step and region in unresolved DEM-CFD |
| title_full_unstemmed | Automatic determination of coupling time step and region in unresolved DEM-CFD |
| title_short | Automatic determination of coupling time step and region in unresolved DEM-CFD |
| title_sort | automatic determination of coupling time step and region in unresolved dem cfd |
| topic | Engineering::Mechanical engineering Domain Solution Coupled Algorithm |
| url | https://hdl.handle.net/10356/164121 |
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