Kε湍流模型
物理
K-omega湍流模型
湍流模型
湍流
雷诺应力
机械
雷诺应力方程模型
曲率
计算流体力学
经典力学
湍流动能
统计物理学
几何学
数学
作者
Yong Han,Lian Zhou,Bai Liu,Weidong Shi,Ramesh K. Agarwal
出处
期刊:Physics of Fluids
[American Institute of Physics]
日期:2021-12-01
卷期号:33 (12)
被引量:37
摘要
Turbulence modeling plays an important role in the accurate prediction of turbulent fluid motion in computational fluid dynamics simulations using the Reynolds-averaged Navier–Stokes equations. A new one-equation Wray–Agarwal (WA) turbulence model has recently been developed by the present authors to improve the prediction of nonequilibrium turbulent flows with large separation and curvature. In this paper, the WA turbulence model is employed to simulate the internal turbulent flow characteristics in a U-bend, and the computed results are compared with experimental data. The results obtained from four other commonly used turbulence models, viz., the one-equation Spalart–Allmaras, two-equation standard k-ε, renormalization group k-ε, and shear stress transport k-ω models, are also compared. Detailed experimental data are obtained using magnetic resonance velocimetry. The results computed with the five different turbulence models show that the WA turbulence model gives the highest accuracy in predicting the complex three-dimensional turbulent characteristics of flow with large curvature in a U-bend.
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