| A simple and novel coupling method for CFD-DEM modeling with uniform kernel-based approximation | |
Zhang, Yan ; Ren WL(任万龙); Li, Peng; Zhang XH(张旭辉); Lu XB(鲁晓兵)
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| Source Publication | COMPUTATIONAL PARTICLE MECHANICS
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| 2024-02 | |
| ISSN | 2196-4378 |
| Abstract | The Eulerian-Lagrangian approach is commonly employed in particulate flows, which can be classified into two subcategories: unresolved computational fluid dynamics-discrete element method (CFD-DEM) and resolved CFD-DEM. When the particle sizes are comparable to the cell sizes, the interphase coupling is not straightforward anymore and both the conventional unresolved CFD-DEM and resolved CFD-DEM are not applicable. In this paper, we propose a simple and novel coupling method for projecting and reconstructing the particle and interphase quantities, which is also called semi-resolved CFD-DEM. The particle quantities are uniformly distributed to the surrounding cells by expanding the fluid domain. The fluid phase quantities at the particle location are also reconstructed from the surrounding cells. Then, the relative velocity and the local void fraction for calculating the drag force are corrected. The expanding factor for the fluid domain is determined by comparing the drag force of the semi-resolved CFD-DEM with the resolved CFD-DEM results. It is found that the expanding factor increases linearly with the autocorrelation length. The developed method is validated by the simulation of a particle sedimentation and a sediment transport process, which proves that the present semi-resolved CFD-DEM fills the gap between the resolved and unresolved CFD-DEM. The difference between the implicit and explicit treatment of momentum exchange term is also discussed, and the explicit treatment shows better performance for large particles. |
| Keyword | CFD-DEM Multiphase flow Momentum exchange Kernel-based method |
| DOI | 10.1007/s40571-024-00725-y |
| Indexed By | SCI |
| Language | 英语 |
| WOS ID | WOS:001172283900001 |
| WOS Research Area | Mathematics ; Mechanics |
| WOS Subject | Mathematics, Interdisciplinary Applications ; Mechanics |
| Funding Organization | National Natural Science Foundation of China |
| Classification | 二类/Q1 |
| Ranking | 1 |
| Contributor | Zhang XH |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/97240 |
| Collection | 流固耦合系统力学重点实验室 |
| Affiliation | 1.【Zhang, Yan & Ren, Wanlong & Li, Peng & Zhang, Xuhui & Lu, Xiaobing】 Chinese Acad Sci, Inst Mech, Beijing 100190, Peoples R China 2.【Ren, Wanlong & Zhang, Xuhui & Lu, Xiaobing】 Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China |
| Recommended Citation GB/T 7714 | Zhang, Yan,Ren WL,Li, Peng,et al. A simple and novel coupling method for CFD-DEM modeling with uniform kernel-based approximation[J]. COMPUTATIONAL PARTICLE MECHANICS,2024.Rp_Au:Zhang XH |
| APA | Zhang, Yan,任万龙,Li, Peng,张旭辉,&鲁晓兵.(2024).A simple and novel coupling method for CFD-DEM modeling with uniform kernel-based approximation.COMPUTATIONAL PARTICLE MECHANICS. |
| MLA | Zhang, Yan,et al."A simple and novel coupling method for CFD-DEM modeling with uniform kernel-based approximation".COMPUTATIONAL PARTICLE MECHANICS (2024). |
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