| Title | Numerical study of viscoelastic upstream instability |
| Author | |
| Corresponding Author | Yu, Peng |
| Publication Years | 2023-03-17
|
| DOI | |
| Source Title | |
| ISSN | 0022-1120
|
| EISSN | 1469-7645
|
| Volume | 959 |
| Abstract | 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. |
| Keywords | |
| URL | [Source Record] |
| Indexed By | |
| Language | English
|
| SUSTech Authorship | First
; Corresponding
|
| Funding Project | 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 Research Area | Mechanics
; Physics
|
| WOS Subject | Mechanics
; Physics, Fluids & Plasmas
|
| WOS Accession No | WOS:000953007500001
|
| Publisher | |
| ESI Research Field | ENGINEERING
|
| Data Source | Web of Science
|
| Citation statistics |
Cited Times [WOS]:0
|
| Document Type | Journal Article |
| Identifier | http://kc.sustech.edu.cn/handle/2SGJ60CL/523969 |
| Department | Department of Mechanics and Aerospace Engineering |
| Affiliation | 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 |
| First Author Affilication | Department of Mechanics and Aerospace Engineering |
| Corresponding Author Affilication | Department of Mechanics and Aerospace Engineering; Southern University of Science and Technology; |
| First Author's First Affilication | Department of Mechanics and Aerospace Engineering |
| Recommended Citation 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).
|
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