DNS of turbulent low Mach channel flow under asymmetric high temperature gradient: Effect of thermal boundary condition on turbulence statistics

被引：16
|
作者：
Avellaneda, J. M. [1 ]
Bataille, F. [1 ]
Toutant, A. [1 ]
机构：
[1] Univ Perpignan Via Domitia, PROMES CNRS, UPR 8521, Perpignan, France
来源：
INTERNATIONAL JOURNAL OF HEAT AND FLUID FLOW | 2019年 / 77卷
关键词：
Turbulence; Direct numerical simulation; Channel flow; Asymmetric heating; Low mach; DIRECT NUMERICAL-SIMULATION; SMOOTH CONCENTRIC ANNULI; HEAT-TRANSFER; PRANDTL NUMBER; ENERGY EXCHANGES; PIPE FLOWS; WALL; REYNOLDS; FIELD;
D O I：
10.1016/j.ijheatfluidflow.2019.03.002
中图分类号：
O414.1 [热力学];
学科分类号：
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.
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页码：40 / 47
页数：8
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