Numerical simulation and scaling analysis of elasticity-induced lift force in a viscoelastic fluid between confining surfaces

doi:10.1007/s42241-022-0061-0

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	Numerical simulation and scaling analysis of elasticity-induced lift force in a viscoelastic fluid between confining surfaces
	Zhao X(赵欣); Wei, Chao 2
刊名	JOURNAL OF HYDRODYNAMICS ; 4
	2022-08
卷号	34 页码:756
关键词	Viscoelastic fluid scaling expression computational fluid dynamics lift force
ISSN号	1001-6058
DOI	10.1007/s42241-022-0061-0
英文摘要	How to accurately characterize the lift force on the particles near the solid surfaces is an ongoing challenge in fluid mechanics and microfluidic techniques, especially in a complex system with viscoelastic fluid or/and soft surface that is commonly encountered in a biological system. The motions of the particles in vicinity of a surface can be simplified to be a rigid cylinder surrounded by the viscoelastic fluid moving along a substrate which can be rigid or soft according to different cases. In such an inertial free system with a wide range of Weissenberg number (Wi < 5.00, representing the ratio of the elastic force to the viscous force), firstly we numerically evaluate the influence of the systematic parameters, including the polymer viscosity, the geometry and Wi, on the net normal force for a cylinder closely moving along a rigid substrate, and the elasticity-induced lift force in a scaled form. It is shown that a strong shear arises in the viscoelastic confinement between the moving cylinder and the rigid substrate, it leads to the asymmetry of the first normal stress distribution around the cylinder, and thus the lift force. Then, the influence of a soft substrate on the lift force is considered, and we find that the lift force induced by the viscoelastic fluid always dominates in magnitude over that induced by the soft substrate deformation. This work provides a reliable scaling that can be utilized to quantify the elasticity-induced lift force on the particles in a viscoelastic system, such as the micro- and nanofluidic systems in biological applications.
学科主题	Mechanics
分类号	二类
语种	英语
WOS记录号	WOS:000853480200002
资助机构	National Natural Science Foundation of China [51875039]
其他责任者	Wei, C (corresponding author), Beijing Inst Technol, Sci & Technol Vehicle Transmiss Lab, Beijing 100081, Peoples R China.
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/90184]
专题	力学研究所_非线性力学国家重点实验室
作者单位	1.Beijing Inst Technol, Sci & Technol Vehicle Transmiss Lab, Beijing 100081, Peoples R China 2.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	Zhao X,Wei, Chao. Numerical simulation and scaling analysis of elasticity-induced lift force in a viscoelastic fluid between confining surfaces[J]. JOURNAL OF HYDRODYNAMICS, 4,2022,34:756.
APA	赵欣,&Wei, Chao.(2022).Numerical simulation and scaling analysis of elasticity-induced lift force in a viscoelastic fluid between confining surfaces.JOURNAL OF HYDRODYNAMICS,34,756.
MLA	赵欣,et al."Numerical simulation and scaling analysis of elasticity-induced lift force in a viscoelastic fluid between confining surfaces".JOURNAL OF HYDRODYNAMICS 34(2022):756.