Large eddy simulation of turbulent natural convection between symmetrically heated vertical parallel plates for water
Large eddy simulation of turbulent natural convection between symmetrically heated vertical parallel plates for water
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DOI：
10.1016/j.ijheatmasstransfer.2016.04.083
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发表时间：
2016-10
影响因子：
5.2
通讯作者：
T. Kogawa;J. Okajima;A. Komiya;S. Armfield;S. Maruyama
中科院分区：
文献类型：
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作者：
T. Kogawa;J. Okajima;A. Komiya;S. Armfield;S. Maruyama
采用数值模拟方法研究了对称加热竖直平行平板间差距内湍流自然对流的边界层干扰效应。进行了大涡模拟，并使用Vreman模型作为动态亚网格模型。通过与实验结果的对比，验证了数值模拟的正确性。通过改变平行板间的差距，研究了边界干扰效应。结果表明，垂直平行板流动的传热速率低于垂直板流动。对边界层和涡结构进行了评价。由于速度边界层外部区域的速度梯度减小，传热减少。平均传热量与层流相似。
The boundary layer interaction effect of the turbulent natural convection in the gap between symmetrically heated vertical parallel plates was evaluated using a numerical simulation in the present study. A large eddy simulation was conducted, and a Vreman model was used as a dynamic subgrid-scale model. The numerical simulation was validated thorough a comparison with the experimental result for the turbulent natural convection adjacent to a single vertical heated plate. The boundary interaction effect was investigated by varying the gap between the parallel plates. The results showed that the flow for vertical parallel plates had a lower heat transfer rate than a vertical plate flow. The boundary layers and vortex structure were evaluated. The heat transfer was reduced as a result of a reduced velocity gradient in the outer region of the velocity boundary layer. The averaged heat transfer was similar to that of the laminar flow.