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首页> 外文期刊>International Journal of Heat and Fluid Flow >DNS of turbulent low Mach channel flow under asymmetric high temperature gradient: Effect of thermal boundary condition on turbulence statistics
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DNS of turbulent low Mach channel flow under asymmetric high temperature gradient: Effect of thermal boundary condition on turbulence statistics

机译：不对称高温梯度下湍流低马赫通道流动的DNS：热边界条件对湍流统计的影响

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摘要

Direct Numerical Simulations have been performed for a fully-developed low Mach turbulent flow of an ideal gas with thermo-dependent viscosity and thermal conductivity in a flat channel at mean friction Reynolds number Re-tau = 180 submitted to asymmetric heating with a wall temperature ratio T-2/T-1 = 2. Mean and turbulent statistics of the flow have been studied and compared for two different thermal boundary conditions: fixed temperatures on the one hand and fixed heat flux densities on the other hand. The influence of the boundary condition type is studied. Temperature variance is particularly impacted by this choice and exhibits asymmetric profiles with different behavior depending on the boundary condition.
机译：已经在平均摩擦雷诺数Re-Tau = 180的平均粘度和导热率下进行了直接数值模拟的理想粘度和导热率，以壁温比提交到不对称加热的平均摩擦雷诺数。 T-2 / T-1 = 2.对两个不同的热边缘条件进行了研究和比较了流动的平均和湍流统计：一方面的固定温度和另一方面固定的热通量密度。研究了边界条件类型的影响。温度方差特别受到该选择的影响，并且根据边界条件表现出具有不同行为的不对称配置。

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