Modeling of MHD turbulent heat transfer in channel flows imposed wall-normal magnetic fields under the various Prandtl number fluids
Modeling of MHD turbulent heat transfer in channel flows imposed wall-normal magnetic fields under the various Prandtl number fluids
复制标题
在各种普朗特数流体下施加壁法向磁场的通道流中 MHD 湍流传热建模
DOI：
10.1016/j.fusengdes.2016.01.004
复制
发表时间：
2016
影响因子：
1.7
通讯作者：
Y. Yamamoto and T. Kunugi
中科院分区：
文献类型：
--
作者：
A. Mehrez;Y. Yamamoto;T. Tsuneyoshi;and Y. Tsuji;Y. Yamamoto and T. Kunugi;Y. Yamamoto and T. Kunugi
利用均匀壁法向磁场作用下充分发展的槽道流动的直接数值模拟数据，对基于恒定湍流Prandtl数的零方程换热模型进行了评价。准理论湍流Prandtl数由不同分子Prandtl数流体的Dns数据估算。从高精度磁流体力学换热预测的角度出发，对磁场作用下k-ɛ模型的湍流涡粘性参数进行了优化。因此，我们使用基于恒定湍流Prandtl数的零方程模型来模拟MHD换热，并说明了用该模型来预测换热的适用性。
Zero-equation heat transfer models based on the constant turbulent Prandtl number are evaluated using direct numerical simulation (DNS) data for fully developed channel flows imposed on a uniform wall-normal magnetic field. Quasi-theoretical turbulent Prandtl numbers are estimated by DNS data of various molecular Prandtl number fluids. From the viewpoint of highly-accurate magneto-hydrodynamic (MHD) heat transfer prediction, the parameters of the turbulent eddy viscosity of thek–ɛmodel are optimized under the magnetic fields. Consequently, we use the zero-equation model based on a constant turbulent Prandtl number to demonstrate MHD heat transfer, and show the applicability of using this model to predict the heat transfer.