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首页> 外文期刊>International Journal of Heat and Mass Transfer >Temperature wall modelling for large-eddy simulation in a heated turbulent plane channel flow
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Temperature wall modelling for large-eddy simulation in a heated turbulent plane channel flow

机译：用于热湍流平面通道流中大涡模拟的温度壁建模

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摘要

Industrial flows are often wall-bounded, characterized by a high Reynolds number turbulence and a strong unsteadiness. Large-eddy Simulations applied to this kind of flows require a heavy mesh resolution which is out of reach of the nowadays computational power. Wall models are usually used to alleviate this constraint. However, very few of them are dedicated to the temperature field. Besides, most of these wall models are based on equilibrium laws which are not able to take into account the unsteadiness of the flow in the near-wall region. In this study, an original thermal wall model, inspired from the TBLE wall model of Balaras et al. [E. Balaras, C. Benocci, U. Piomelli, Two-layer approximate boundary conditions for large-eddy simulations, AIAA J. 34 (6) (1996) 1111-1119], is developed and implemented in the CEA (French Atomic Center) Trio_U code and assessed on a heated and turbulent plane channel flow configuration. The investigated friction Reynolds numbers are 395, 1020 and 4800, and the Prandtl number is taken equal to 0.71.
机译：工业流常常是有边界的，其特征在于雷诺数湍流高且不稳定。适用于此类流动的大涡模拟需要较重的网格分辨率，这是当今计算能力无法企及的。通常使用墙模型来减轻这种约束。但是，它们中很少有专门用于温度场的。此外，大多数这些壁模型是基于平衡定律的，而这些定律不能考虑到近壁区域中流动的不稳定性。在这项研究中，一个原始的热墙模型受到Balaras等人的TBLE墙模型的启发。 [E. Balaras，C. Benocci，U. Piomelli，用于大涡模拟的两层近似边界条件，AIAA J. 34（6）（1996）1111-1119]，是在CEA（法国原子中心）Trio_U中开发和实现的编码并在加热的湍流平面通道流动配置上进行评估。研究的摩擦雷诺数为395、1020和4800，普朗特数等于0.71。

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