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Numerical studies of nonstationary conjugate convective heat transfer in vertical layers of liquid and gas separated by a thin metal partition
Thermophysics and Aeromechanics ( IF 0.5 ) Pub Date : 2021-05-21 , DOI: 10.1134/s0869864321010108
V. S. Berdnikov , S. A. Kislitsyn

The development of a convective flow after sudden heating of a vertical wall that laterally bounds a layer of ethyl alcohol in a system consisting of vertical layers of alcohol and air, separated by a thin metal partition, is studied numerically in a conjugate problem statement. The equations of thermogravitational convection in the Boussinesq approximation, written in variables of temperature, vortex, and stream function, are solved by the finite element method. The development of unsteady hydrodynamic and thermal boundary layers on all four vertical walls is studied. The temperature fields in liquid, gas and in a vertical partition are calculated. The features of the development of the spatial form of the flow and unsteady conjugate convective heat transfer between the layers of liquid and gas affect significantly the unsteady temperature fields and temperature gradients in a thin metal partition. The maximum temperature gradients in the partition appear at the initial stage of flow development.



中文翻译:

薄金属隔板分隔的垂直于液和气层的非平稳共轭对流换热的数值研究

在共轭问题陈述中,对在垂直方向上突然加热的垂直壁(在侧面由一层薄薄的金属隔板隔开的由酒精和空气构成的垂直层组成的系统中)横向约束了一层乙醇后,对流的发展进行了数值研究。用有限元方法求解用温度,涡旋和流函数变量编写的Boussinesq近似中的热引流对流方程。研究了四个垂直壁上非定常的动水边界层和热边界层的发展。计算液体,气体和垂直分区中的温度场。液体和气体层之间的流动空间形式和非稳态共轭对流传热的发展特征显着影响了薄金属隔板中的非稳态温度场和温度梯度。隔板中的最大温度梯度出现在流动发展的初始阶段。

更新日期:2021-05-22
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