Nonlinear Turbulence Models That Predict Strong Curvature Effects

XU Jing-lei; MA Hui-yang; HUANG Yu-ning

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XU Jing-lei, MA Hui-yang, HUANG Yu-ning. Nonlinear Turbulence Models That Predict Strong Curvature Effects[J]. Applied Mathematics and Mechanics, 2008, 29(1): 27-37.

Citation:

XU Jing-lei, MA Hui-yang, HUANG Yu-ning. Nonlinear Turbulence Models That Predict Strong Curvature Effects[J]. Applied Mathematics and Mechanics, 2008, 29(1): 27-37.

Citation:

XU Jing-lei, MA Hui-yang, HUANG Yu-ning. Nonlinear Turbulence Models That Predict Strong Curvature Effects[J]. Applied Mathematics and Mechanics, 2008, 29(1): 27-37.

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Nonlinear Turbulence Models That Predict Strong Curvature Effects

1.
Department of Physics, Graduate School of the Chinese Academy of Sciences, Beijing 100049, P. R. China;

Received Date: 2007-10-28
Rev Recd Date: 2007-12-13
Publish Date: 2008-01-15

Abstract

Abstract

The curvature effects on the structure of turbulence were analyzed qualitatively. Numerical simulations of a turbulent U-duct flow with a number of turbulence models in order to assess their overall performance were conducted. The models evaluated are some typical linear eddy viscosity turbulence models, nonlinear eddy viscosity turbulence models (NLEVM) (quadratic and cubic), a quadratic explicit algebraic stress model (EASM) and a Reynolds stress model (RSM) developed based on the secondmoment closure. The numerical results show that a cubic NLEVM that performs considerably well in other benchmark turbulent flows, such as the Craft, Launder and Suga model and the Huang and Ma model, is able to capture the major features of the highly curved turbulent U-duct flow, including the damping of turbulence near the convex wall, the enhancement of turbulence near the concave wall, and the subsequent turbulent flow separation. The predictions of the cubic models are quite close to that of the RSM, in relatively good agreement with the experimental data, which suggests that these models may be applied to simulating the turbulent curved flows in engineering applications.
- curvature effect,
- nonlinear eddy viscosity turbulence model,
- Reynolds stress model

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References(17)

References

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