The immersed boundary method for confined flows: Numerical diffusion and simulation accuracy of a boundary retraction scheme

doi:10.1016/j.compfluid.2022.105690

CORC > 力学研究所 > 中国科学院力学研究所 > 非线性力学国家重点实验室

	The immersed boundary method for confined flows: Numerical diffusion and simulation accuracy of a boundary retraction scheme
	Abbati, Alessia 4; Zhang, Ya 3; Dempster, William 4; Zhang, Yonghao 1,2
刊名	COMPUTERS & FLUIDS
	2022-12-15
卷号	249 页码:11
关键词	Immersed boundary method Lattice Boltzmann method Diffuse-interface Boundary retraction
ISSN号	0045-7930
DOI	10.1016/j.compfluid.2022.105690
通讯作者	Zhang, Yonghao(yonghao.zhang@imech.ac.cn)
英文摘要	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.
分类号	二类
WOS关键词	LATTICE-BOLTZMANN METHOD ; CIRCULAR-CYLINDER MIDWAY ; 2 PARALLEL PLATES ; STOKES-FLOW ; PARTICLE SEDIMENTATION ; MOMENTUM-EXCHANGE ; RIGID CYLINDER ; DRAG FORCE ; FLUID ; POISEUILLE
WOS研究方向	Computer Science ; Mechanics
语种	英语
WOS记录号	WOS:000879159300003
其他责任者	Zhang, Yonghao
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/90735]
专题	力学研究所_非线性力学国家重点实验室
作者单位	1.Chinese Acad Sci, Inst Mech, Beijing 100190, Peoples R China 2.Univ Edinburgh, Sch Engn, Edinburgh EH9 3FD, Scotland; 3.China Automot Innovat Corp, Nanjing 211100, Jiangsu, Peoples R China; 4.Univ Strathclyde, Dept Mech & Aerosp Engn, Glasgow G1 1XJ, Scotland;
推荐引用方式 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.
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.