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首页> 外文期刊>Journal of Mechanical Science and Technology >Turbulence modeling of natural convection in enclosures: A review
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Turbulence modeling of natural convection in enclosures: A review

机译：外壳自然对流的湍流建模：综述

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摘要

In this paper a review of recent developments of turbulence models for natural convection in enclosures is presented. The emphasis is placed on the effect of the treatments of Reynolds stress and turbulent heat flux on the stability and accuracy of the solution for natural convection in enclosures. The turbulence models considered in the preset study are the two-layer k − ɛ model, the shear stress transport (SST) model, the elliptic-relaxation (V2-f) model and the elliptic-blending second-moment closure (EBM). Three different treatments of the turbulent heat flux are the generalized gradient diffusion hypothesis (GGDH), the algebraic flux model (AFM) and the differential flux model (DFM). The mathematical formulation of the above turbulence models and their solution method are presented. Evaluation of turbulence models are performed for turbulent natural convection in a 1:5 rectangular cavity ( Ra= 4.3×1010) and in a square cavity with conducting top and bottom walls ( Ra= 9 1.58×109) and the Rayleigh-Benard convection ( Ra = 2 × 106 ∼ Ra = 109). The relative performances of turbulence models are examined and their successes and shortcomings are addressed.
机译：在本文中，对封闭空间自然对流湍流模型的最新发展进行了综述。重点放在雷诺应力和湍流热通量的处理对机柜中自然对流解决方案的稳定性和准确性的影响上。预设研究中考虑的湍流模型是两层k-ɛ模型，切应力传递（SST）模型，椭圆松弛（V2-f）模型和椭圆混合第二矩闭合（EBM）模型。湍流通量的三种不同处理方法是广义梯度扩散假设（GGDH），代数通量模型（AFM）和微分通量模型（DFM）。给出了上述湍流模型的数学公式及其求解方法。在1：5矩形腔（Ra = 4.3×10 10 ）和具有导电顶壁和底壁的方腔中对湍流自然对流进行湍流模型评估（Ra = 9 1.58×10 9 ）和瑞利-贝纳德对流（Ra = 2×10 6 〜Ra = 10 9 ）。研究了湍流模型的相对性能，并解决了它们的成功和缺点。

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