Control of a sedimenting elliptical particle by electromagnetic forces

doi:10.1063/5.0038504

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

	Control of a sedimenting elliptical particle by electromagnetic forces
	Qin, Jianhua 1,2,3; Dong GZ(董国展)1,2; Zhang, Hui 3
刊名	PHYSICS OF FLUIDS
	2021-03-01
卷号	33 期号:3 页码:14
ISSN号	1070-6631
DOI	10.1063/5.0038504
通讯作者	Dong, Guodan(dongguodan9@163.com) ; Zhang, Hui(zhanghui1902@hotmail.com)
英文摘要	In this paper, the effectiveness of electromagnetic forces on controlling the motion of a sedimenting elliptical particle is investigated using the immersed interface-lattice Boltzmann method (II-LBM) in which a signed distance function is adopted to apply the jump conditions for the II-LBM and to add external electromagnetic forces. First, mechanisms of electromagnetic control on suppressing vorticity generation based on the vorticity equation and vortex shedding based on the streamwise momentum equation are discussed. Then, systematic investigations are performed to quantify and qualify the effects of the electromagnetic control by changing the electromagnetic strength, the initial orientation angle of the elliptical particle, and the density ratio of the particle to the fluid. To demonstrate the control effect of different cases, comparisons of vorticity fields, particle trajectories, orientation angles, and energy transfers of the particles are presented. The results show that the rotational motion of the particle can be well controlled by appropriate magnitudes of electromagnetic forces. In a relatively high solid to fluid density ratio case where vortex shedding appears, the sedimentation speed can increase nearly 40% and the motion of the particle turns into a steady descending motion once an appropriate magnitude of the electromagnetic force is applied. When the magnitude of the electromagnetic force is excessive, the particle will deviate from the center of the side walls. In addition, the controlling approach is shown to be robust for various initial orientation angles and solid to fluid density ratios.
分类号	一类/力学重要期刊
资助项目	NSFC Basic Science Center Program for Multiscale Problems in Nonlinear Mechanics[11988102]
WOS研究方向	Mechanics ; Physics
语种	英语
WOS记录号	WOS:000630510300001
资助机构	NSFC Basic Science Center Program for Multiscale Problems in Nonlinear Mechanics
其他责任者	Dong, Guodan ; Zhang, Hui
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/86216]
专题	力学研究所_非线性力学国家重点实验室
作者单位	1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China; 2.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China; 3.Nanjing Univ Sci & Technol, Key Lab Transit Phys, Nanjing 210094, Jiangsu, Peoples R China
推荐引用方式 GB/T 7714	Qin, Jianhua,Dong GZ,Zhang, Hui. Control of a sedimenting elliptical particle by electromagnetic forces[J]. PHYSICS OF FLUIDS,2021,33(3):14.
APA	Qin, Jianhua,董国展,&Zhang, Hui.(2021).Control of a sedimenting elliptical particle by electromagnetic forces.PHYSICS OF FLUIDS,33(3),14.
MLA	Qin, Jianhua,et al."Control of a sedimenting elliptical particle by electromagnetic forces".PHYSICS OF FLUIDS 33.3(2021):14.