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On Application of EARSM Turbulence Model for Simulation of Flow Field behind Rack Station

机译：EARSM湍流模型在机架站后流场模拟中的应用

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This paper is interested in the mathematical modeling and approximation of the turbulent flow with strong anisotropy for the case of flow in a rack station. Turbulent models based on Boussinesq eddy viscosity assumption are traditionally employed for the solution of these types of flows. Linear eddy viscosity model and the assumption of isotropic Reynolds stress tensor are typically used in many cases. This leads to certain limitations in the cases of either separated flow or flow with significant curvature of the mean flow. The application of full Reynolds stress model is suitable for this case but it introduces at least seven additional equations and the model has much higher demand for computing time, grid parameters and discretization schemes. Therefore the Explicit Algebraic Reynolds Stress Model (EARSM) is used here. This model is based on two equations k – omega turbulence model with the nonlinear eddy viscosity model and explicit terms for anisotropic parts of the Reynolds stress tensor. The computational requirements are similar to the standard k – omega model. The numerical and experimental results from PIV measurement are compared.
机译：对于机架站中的流动情况，本文对具有强各向异性的湍流的数学建模和近似感兴趣。传统上采用基于Boussinesq涡流粘度假设的湍流模型来求解这些类型的流动。通常在许多情况下使用线性涡流粘度模型和各向同性雷诺应力张量的假设。这在分离流或具有平均流曲率显着的流的情况下导致某些限制。完整的雷诺应力模型适用于这种情况，但它引入了至少七个附加方程，并且该模型对计算时间，网格参数和离散化方案有更高的要求。因此，此处使用显式代数雷诺应力模型（EARSM）。该模型基于两个方程式k –ω湍流模型，具有非线性涡流粘度模型和雷诺应力张量各向异性部分的显式项。计算要求与标准k –ω模型相似。比较了PIV测量的数值和实验结果。

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