格拉肖夫数
努塞尔数
普朗特数
材料科学
格子Boltzmann方法
机械
绝热过程
传热
理查森数
自然对流和联合对流
纵横比(航空)
热力学
工作(物理)
对流
自然对流
温度梯度
物理
雷诺数
浮力
复合材料
气象学
湍流
作者
Humayoun Shahid,Saima Murtaza,Mehboob Ali,Shahzad Khurram,Taseer Muhammad,Waqar Azeem Khan
标识
DOI:10.1016/j.triboint.2023.108654
摘要
In the present work, we numerically investigated the mixed convection in a U-shaped lid-driven cavity with non-uniformly heated sidewalls by using the MRT-LBM technique to stimulate the flow behavior and temperature fields. Both vertical walls (Left and Right) are non-uniformly heated, and the top horizontal wall is kept at adiabatic and moving with constant velocity u0. The bottom U-shaped wall is kept at constant temperature. The results are presented for different parameters such as Richardson number (0.01−100), Prandtl number (0.7,1,7), aspect ratio of geometry (0.1,0.3,0.5,0.7,0.9), Grashof number (103,105,106,4 × 104,9 × 104). Nusselt number is also calculated along the heated wall. Our results demonstrate that the heat transfer rate at non-uniformly heated walls increases with an increase in the aspect ratio.
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