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A three‐dimensional simulation of a steady approach flow past a circular cylinder at low Reynolds number
Author(s) -
Zhang Jianfeng,
Dalton Charles
Publication year - 1998
Publication title -
international journal for numerical methods in fluids
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.938
H-Index - 112
eISSN - 1097-0363
pISSN - 0271-2091
DOI - 10.1002/(sici)1097-0363(19980515)26:9<1003::aid-fld611>3.0.co;2-w
Subject(s) - strouhal number , reynolds number , potential flow around a circular cylinder , mechanics , lift (data mining) , wake , cylinder , drag , mathematics , flow (mathematics) , physics , drag coefficient , lift to drag ratio , geometry , lift coefficient , classical mechanics , turbulence , computer science , data mining
The three‐dimensional (3D) unsteady viscous wake of a circular cylinder exposed to a steady approach flow is calculated using a fractional‐step finite‐difference/spectral‐element method. The calculated flow fields at Reynolds numbers of 100 (2D) and 200 (3D) are examined in detail. The flow field at Re = 100 is 2D as expected, while the flow field at Re = 200 has distinct 3D features, with spanwise wavelengths of about 3.75 cylinder diameters. The calculated results produce drag and lift coefficients and Strouhal numbers that agree extremely well with the experimental values. These 3D values at Re = 200 are in better agreement with experimental values than the results of a 2D calculation at Re = 200, which is expected. © 1998 John Wiley & Sons, Ltd.