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Conjugate heat transfer analysis of liquid metal turbulent flow through a horizontal channel by LES
Numerical Heat Transfer, Part A: Applications ( IF 2.8 ) Pub Date : 2020-06-26
N. Satish, K. Venkatasubbaiah

Conjugate heat transfer analysis of liquid metal turbulent flow through a horizontal channel has been numerically studied using a large eddy simulation (LES) technique. The effect of wall thickness and heat conduction in the wall on flow and thermal characteristics of low Prandtl number liquid metals has been investigated and reported here. Results are presented for three different liquid metal flows with different Reynolds numbers and different wall materials with wall thickness. The flow field is modeled as transient two-dimensional incompressible turbulent forced convection flow. Wall Adapting Local Eddy Viscosity (WALE) sub-grid scale (SGS) model is used to solve the turbulence closure. Two-dimensional transient heat conduction equation is solved to know the temperature distribution in the wall. A finite difference method solver is developed for solving the governing equations using sixth-order accuracy of compact schemes. Prandtl number and Reynolds number alter the heat transfer characteristics. Wall thickness shows a significant effect on the convective heat transfer rate. The new correlation of average Nusselt number has been proposed, including the effect of wall thickness for constant heat flux boundary condition. The present results are validated with DNS data and experimental results available in the literature.



中文翻译:

LES对液态金属湍流通过水平通道的共轭传热分析

使用大涡模拟(LES)技术对液态金属湍流通过水平通道的共轭传热分析进行了数值研究。壁厚和壁中的热传导对低普朗特数液态金属的流动和热特性的影响已在此处进行了研究和报道。给出了三种不同雷诺数和不同壁厚壁材的液态金属流动的结果。将流场建模为瞬态二维不可压缩湍流强迫对流。墙体适应局部涡粘性(WALE)子网格比例(SGS)模型用于解决湍流闭合问题。求解二维瞬态热传导方程,以了解墙内的温度分布。开发了一种使用差分格式的六阶精度求解控制方程的有限差分法求解器。普朗特数和雷诺数改变了传热特性。壁厚显示出对流传热速率的显着影响。提出了新的平均努塞尔数相关性,包括壁厚对恒定热通量边界条件的影响。本结果已通过DNS数据和文献中提供的实验结果进行了验证。包括壁厚对恒定热通量边界条件的影响。本结果已通过DNS数据和文献中提供的实验结果进行了验证。包括壁厚对恒定热通量边界条件的影响。本结果已通过DNS数据和文献中提供的实验结果进行了验证。

更新日期:2020-06-26
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