南方科技大学知识苑(SUSTech KC): Numerical study of viscoelastic upstream instability

题名	Numerical study of viscoelastic upstream instability
作者	Peng, Sai1 ; Tang, Tingting1 ; Li, Jianhui1,2 ; Zhang, Mengqi 3; Yu, Peng1,4,5
通讯作者	Yu, Peng
发表日期	2023-03-17
DOI	10.1017/jfm.2023.92
发表期刊	JOURNAL OF FLUID MECHANICS 影响因子和分区
ISSN	0022-1120
EISSN	1469-7645
卷号	959
摘要	In this work, we report numerical results on the flow instability and bifurcation of a viscoelastic fluid in the upstream region of a cylinder in a confined narrow channel. Two-dimensional direct numerical simulations based on the FENE-P model (the finite-extensible nonlinear elastic model with the Peterlin closure) are conducted with numerical stabilization techniques. Our results show that the macroscopic viscoelastic constitutive relation can capture the viscoelastic upstream instability reported in previous experiments for low-Reynolds-number flows. The numerical simulations reveal that the non-dimensional recirculation length (L-D) is affected by the cylinder blockage ratio (BR), the Weissenberg number (Wi), the viscosity ratio (beta) and the maximum polymer extension (L). Close to the onset of upstream recirculation, L-D with Wi satisfy Landau-type quartic potential under certain parameter space. The bifurcation may exhibit subcritical behaviour depending on the values of L-2 and beta. The parameters beta and L-2 have nonlinear influence on the upstream recirculation length. This work contributes to our theoretical understanding of this new instability mechanism in viscoelastic wake flows.
关键词	viscoelasticity wakes
相关链接	[来源记录]
收录类别	SCI ; EI
语种	英语
学校署名	第一 ; 通讯
资助项目	Shenzhen Science and Technology Innovation Commission[JCYJ20180504165704491] ; Guangdong Provincial Key Laboratory of Turbulence Research and Applications[2019B21203001] ; National Natural Science Foundation of China (NSFC)["12172163","12002148","12071367"]
WOS研究方向	Mechanics ; Physics
WOS类目	Mechanics ; Physics, Fluids & Plasmas
WOS记录号	WOS:000953007500001
出版者	CAMBRIDGE UNIV PRESS
EI入藏号	20231213761413
EI主题词	Bifurcation (mathematics) ; Cylinders (shapes) ; Numerical models ; Reynolds number ; Stability ; Wakes
EI分类号	Fluid Flow, General:631.1 ; Mathematics:921 ; Physical Properties of Gases, Liquids and Solids:931.2
ESI学科分类	ENGINEERING
来源库	Web of Science
引用统计	被引频次[WOS]：4
成果类型	期刊论文
条目标识符	http://sustech.caswiz.com/handle/2SGJ60CL/523969
专题	工学院_力学与航空航天工程系
作者单位	1.Southern Univ Sci & Technol, Dept Mech & Aerosp Engn, Shenzhen 518055, Peoples R China 2.Guangxi Acad Sci, Nanning 530007, Peoples R China 3.Natl Univ Singapore, Dept Mech Engn, 9 Engn Dr 1, Singapore 117575, Singapore 4.Southern Univ Sci & Technol, Guangdong Prov Key Lab Turbulence Res & Applicat, Shenzhen 518055, Peoples R China 5.Southern Univ Sci & Technol, Ctr Complex Flows & Soft Matter Res, Shenzhen 518055, Peoples R China
第一作者单位	力学与航空航天工程系
通讯作者单位	力学与航空航天工程系; 南方科技大学
第一作者的第一单位	力学与航空航天工程系
推荐引用方式 GB/T 7714	Peng, Sai,Tang, Tingting,Li, Jianhui,et al. Numerical study of viscoelastic upstream instability[J]. JOURNAL OF FLUID MECHANICS,2023,959.
APA	Peng, Sai,Tang, Tingting,Li, Jianhui,Zhang, Mengqi,&Yu, Peng.(2023).Numerical study of viscoelastic upstream instability.JOURNAL OF FLUID MECHANICS,959.
MLA	Peng, Sai,et al."Numerical study of viscoelastic upstream instability".JOURNAL OF FLUID MECHANICS 959(2023).