| Title | Effect of wall slip on laminar flow past a circular cylinder |
| Author | |
| Corresponding Author | Peng, Sai |
| Publication Years | 2022-08-01
|
| DOI | |
| Source Title | |
| ISSN | 0001-5970
|
| EISSN | 1619-6937
|
| Abstract | A numerical study of two-dimensional flow past a confined circular cylinder with slip wall is performed. A dimensionless number, Knudsen number (Kn), is used to describe the slip length of the cylinder wall. The Reynolds number (Re) and Knudsen number (Kn) ranges considered are Re = [1, 180] and Kn = [0, infinity), respectively. Time-averaged flow separation angle ((theta(s)) over bar), dimensionless recirculation length ((L-s) over bar), and tangential velocity ((u(tau)) over bar) distributed on the cylinder's wall, drag coefficient ((C-d) over bar) and drag reduction (DR) are investigated. The time-averaged tangential velocity distributed on the cylinder's wall fits well with the formula (u(tau)) over bar = U-infinity. [alpha/1+beta e(-gamma(pi-theta)) + delta]. sin theta, where the coefficients (alpha, beta, gamma, delta) are related to Re and Kn, and U infinity the incoming velocity. Several scaling laws are found, log((u(tau) (max)) over bar) similar to log(Re) and (u(tau max)) over bar similar to Kn for low Kn ((u(tau max)) over bar is the maximum tangential velocity on the cylinder's wall), log(DR)similar to log(Re) (Re <= 45 and Kn <= 0.1) and log(DR) similar to log(Kn) (Kn <= 0.05). At low Re, DRv (the friction drag reduction) is the main source of DR. However, DRp (the differential pressure drag reduction) contributes most to DR at high Re (Re > similar to 60) and Kn over a critical number. DRv is found almost independent of Re. |
| URL | [Source Record] |
| Indexed By | |
| Language | English
|
| SUSTech Authorship | Corresponding
|
| Funding Project | National Natural Science Foundation of China (NSFC)[12002148]
; Guangdong Basic and Applied Basic Research Foundation[2022A1515011057]
|
| WOS Research Area | Mechanics
|
| WOS Subject | Mechanics
|
| WOS Accession No | WOS:000847248800003
|
| Publisher | |
| EI Accession Number | 20223612692256
|
| EI Keywords | Circular cylinders
; Flow separation
; Laminar flow
; Reynolds number
; Velocity
|
| ESI Classification Code | Fluid Flow:631
; Fluid Flow, General:631.1
|
| 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/395959 |
| Department | Department of Mechanics and Aerospace Engineering |
| Affiliation | 1.Wuhan Univ Technol, Minist Educ, Key Lab High Performance Ship Technol, Wuhan 430063, Peoples R China 2.Wuhan Univ Technol, Sch Naval Architecture Ocean & Energy Power Engn, Wuhan 430063, Peoples R China 3.Wuxi Inst Commun Technol, Sch Naval Engn, Wuxi 214151, Jiangsu, Peoples R China 4.Southern Univ Sci & Technol, Dept Mech & Aerosp Engn, Shenzhen Key Lab Complex Aerosp Flows, Shenzhen 518055, Peoples R China 5.Govt Coll Univ Faisalabad, Dept Math, Faisalabad 38000, Pakistan |
| Corresponding Author Affilication | Department of Mechanics and Aerospace Engineering |
| Recommended Citation GB/T 7714 |
Li, Yan-cheng,Peng, Sai,Kouser, Taiba. Effect of wall slip on laminar flow past a circular cylinder[J]. ACTA MECHANICA,2022.
|
| APA |
Li, Yan-cheng,Peng, Sai,&Kouser, Taiba.(2022).Effect of wall slip on laminar flow past a circular cylinder.ACTA MECHANICA.
|
| MLA |
Li, Yan-cheng,et al."Effect of wall slip on laminar flow past a circular cylinder".ACTA MECHANICA (2022).
|
| Files in This Item: | There are no files associated with this item. | |||||
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