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首页> 外文期刊>International Journal of Heat and Mass Transfer >Large-eddy simulation of turbulent heat convection in a spanwise rotating channel flow
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Large-eddy simulation of turbulent heat convection in a spanwise rotating channel flow

机译：翼展方向旋转通道流中湍流对流的大涡模拟

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摘要

In this paper, we investigate the effects of the Coriolis force in a heated plane channel flow subjected to spanwise rotation using the method of large-eddy simulation. We present both the general and simplified transport equations for the resolved turbulent stresses, which are essential for understanding the unique pattern of turbulent kinetic energy production in a rotating system. Numerical simulations are performed using primarily two dynamic subgrid-scale stress models and one dynamic subgrid-scale heat flux model; namely, the conventional dynamic model (DM) and a novel dynamic nonlinear model (DNM) for closure of the filtered momentum equation, and an advanced dynamic full linear tensor thermal dif-fusivity model (DFLTDM) for closure of the filtered thermal energy equation. The turbulent flow field studied herein is characterized by a Reynolds number Re_τ = 150 and various rotation numbers Ro_τ ranging from 0 to 7.5. In order to validate the LES approach, turbulent statistics obtained from the simulations are thoroughly compared with the available experimental results and direct numerical simulation (DNS) data. A detailed comparative study has been conducted in order to evaluate the performance of the DM and DNM in terms of their prediction of characteristic features of the velocity and temperature fields and their capability of reflecting both forward and backward scatter of kinetic energy between the filtered and subgrid scales.
机译：在本文中，我们使用大涡模拟方法研究科里奥利力在翼展方向旋转的受热平面通道流中的影响。我们给出了解决湍流应力的通用和简化输运方程，这对于理解旋转系统中湍动能产生的独特模式至关重要。数值模拟主要使用两个动态亚网格规模的应力模型和一个动态亚网格规模的热通量模型进行；即，常规动力学模型（DM）和新颖的动力学非线性模型（DNM）用于闭合滤波的动量方程，以及先进的动态全线性张量热扩散模型（DFLTDM）用于闭合滤波的热能方程。本文研究的湍流场的特征在于雷诺数Re_τ= 150和各种旋转数Ro_τ从0到7.5。为了验证LES方法，将从模拟获得的湍流统计数据与可用的实验结果和直接数值模拟（DNS）数据进行了彻底比较。为了评估DM和DNM的速度和温度场特征以及它们反映过滤后的和子网格之间的动能向前和向后散射的能力，已经进行了详细的比较研究，以评估DM和DNM的性能。秤。

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