| The immersed boundary method for confined flows: Numerical diffusion and simulation accuracy of a boundary retraction scheme | |
| Abbati, Alessia1; Zhang, Ya2; Dempster, William1; Zhang, Yonghao3,4 | |
| Corresponding Author | Zhang, Yonghao([email protected]) |
| Source Publication | COMPUTERS & FLUIDS
 |
| 2022-12-15 | |
| Volume | 249Pages:11 |
| ISSN | 0045-7930 |
| Abstract | Diffuse-interface immersed boundary methods (IBM) have been successfully applied to numerous complex fluid-structure interaction problems because of their simple and efficient implementation. Despite their ability to suppress numerical oscillations significantly compared to sharp-interface methods, the diffuse interface is likely to reduce simulation accuracy of the flow field around the solid boundary. The present work investigates the diffusive effects of IBM and the mitigation method for surface-confined particulate flows by comparing results to sharp-interface methods. It is found that increasingly-confined geometries accentuate interface diffusion effects and decrease simulation accuracy. To minimise the diffusive effects of IBM, a boundary retraction scheme is used and its effectiveness is examined, in particular for particles in close contact where the diffuse interfaces overlap. It is shown that this simple implementation is capable of alleviating interface diffusion errors, thus increasing accuracy while limiting computational costs. With an optimal boundary retraction scheme, IBM can successfully capture fluid-structure interactions at different degrees of confinement, comparable to sharp-interface methods. |
| Keyword | Immersed boundary method Lattice Boltzmann method Diffuse-interface Boundary retraction |
| DOI | 10.1016/j.compfluid.2022.105690 |
| Indexed By | SCI ; EI |
| Language | 英语 |
| WOS ID | WOS:000879159300003 |
| WOS Keyword | LATTICE-BOLTZMANN METHOD ; CIRCULAR-CYLINDER MIDWAY ; 2 PARALLEL PLATES ; STOKES-FLOW ; PARTICLE SEDIMENTATION ; MOMENTUM-EXCHANGE ; RIGID CYLINDER ; DRAG FORCE ; FLUID ; POISEUILLE |
| WOS Research Area | Computer Science ; Mechanics |
| WOS Subject | Computer Science, Interdisciplinary Applications ; Mechanics |
| Classification | 二类 |
| Ranking | 1 |
| Contributor | Zhang, Yonghao |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/90736 |
| Collection | 非线性力学国家重点实验室 |
| Affiliation | 1.Univ Strathclyde, Dept Mech & Aerosp Engn, Glasgow G1 1XJ, Scotland; 2.China Automot Innovat Corp, Nanjing 211100, Jiangsu, Peoples R China; 3.Univ Edinburgh, Sch Engn, Edinburgh EH9 3FD, Scotland; 4.Chinese Acad Sci, Inst Mech, Beijing 100190, Peoples R China |
| Recommended Citation GB/T 7714 | Abbati, Alessia,Zhang, Ya,Dempster, William,et al. The immersed boundary method for confined flows: Numerical diffusion and simulation accuracy of a boundary retraction scheme[J]. COMPUTERS & FLUIDS,2022,249:11.Rp_Au:Zhang, Yonghao |
| APA | Abbati, Alessia,Zhang, Ya,Dempster, William,&Zhang, Yonghao.(2022).The immersed boundary method for confined flows: Numerical diffusion and simulation accuracy of a boundary retraction scheme.COMPUTERS & FLUIDS,249,11. |
| MLA | Abbati, Alessia,et al."The immersed boundary method for confined flows: Numerical diffusion and simulation accuracy of a boundary retraction scheme".COMPUTERS & FLUIDS 249(2022):11. |
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| Jp2022FA009_2022_The（3483KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Download | |
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