Effect of turbulence modelling on the computation of the near-wake flow of a circular cylinder

被引：38

作者：

Unal, Ugur Oral ^{[2
]}

Atlar, Mehmet ^{[1
]}

Goren, Omer ^{[2
]}

机构：

[1] Univ Newcastle, Sch Marine Sci & Technol, Newcastle Upon Tyne, Tyne & Wear, England

[2] Istanbul Tech Univ, Fac Naval Architecture & Ocean Engn, TR-80626 Istanbul, Turkey

来源：

OCEAN ENGINEERING | 2010年 / 37卷 / 04期

关键词：

RANS; Turbulence modelling; Circular cylinder; Near-wake now; UNSTEADY FLOWS; ONE-EQUATION; VORTEX; SIMULATION; LAMINAR; SMOOTH; FIELD;

D O I：

10.1016/j.oceaneng.2009.12.007

中图分类号：

U6 [水路运输]; P75 [海洋工程];

学科分类号：

0814 ; 081505 ; 0824 ; 082401 ;

摘要：

An evaluation of four well-known Reynolds-Averaged Navier-Stokes (RANS)-based turbulence models was performed in comparison with the results of a dedicated experimental measurement oil the near-wake of a circular cylinder in a large water (cavitation) tunnel using a state-of-the-art two-dimensional Digital Particle Image Velocimetry (DPIV) device. The turbulence models investigated were Spalart-Allmaras (S-A), Realizable k-epsilon (RKE), Wilcox k-omega (WKO) and Shear-Stress-Transport k-omega (SST), which were assessed based oil their comparative performances in predicting some important now field characteristics of the near-wake region of the experimental circular cylinder now. Within the flow range investigated in this study, which implied a cylinder diameter-based Reynolds Number of 41,300, the qualitative and quantitative comparisons revealed that the application of the SST model to the wall-bounded unsteady flow - that experienced severe adverse pressure gradient, massive flow separation and vortex shedding - presents more successful predictions compared to other models investigated for such challenging flow conditions. (C) 2009 Elsevier Ltd. All rights reserved.

引用

页码：387 / 399

页数：13

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