Numerical simulation of double-diffusive mixed convective flow in rectangular enclosure with insulated moving lid
Numerical simulation of double-diffusive mixed convective flow in rectangular enclosure with insulated moving lid
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DOI：
10.1016/j.ijthermalsci.2010.04.023
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发表时间：
2010-09
影响因子：
4.5
通讯作者：
M. Teamah;W. El-Maghlany
中科院分区：
文献类型：
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作者：
M. Teamah;W. El-Maghlany
本文研究了在热扩散和质扩散共同浮力作用下，矩形盖驱动空腔内的混合对流。本文对具有移动上表面的矩形封闭腔内的双扩散对流进行了数值研究。上下表面都是绝缘和不可渗透的。恒定不同的温度和浓度施加沿着封闭体的垂直壁，稳态层流制度被认为是。求解了连续性、动量、能量和物质传递的输运方程。数值计算结果的影响理查森数，刘易斯数，浮力比上的等值线的流线，温度和浓度。此外，本地和平均Nusselt和舍伍德数的预测结果，并讨论了各种参数条件。该研究是在0.1 ≤ Le ≤ 50和普朗特数Pr = 0.7的情况下进行的。在整个研究过程中，Grashof数和长宽比分别保持为104和2，−10 ≤ N ≤ 10，而Richardson数在0.01到10之间变化，以模拟强迫对流为主的流动，混合对流和自然对流为主的流动。
The present study is concerned with the mixed convection in a rectangular lid-driven cavity under the combined buoyancy effects of thermal and mass diffusion. Double-diffusive convective flow in a rectangular enclosure with moving upper surface is studied numerically. Both upper and lower surfaces are being insulated and impermeable. Constant different temperatures and concentration are imposed along the vertical walls of the enclosure, steady state laminar regime is considered. The transport equations for continuity, momentum, energy and spices transfer are solved. The numerical results are reported for the effect of Richardson number, Lewis number, and buoyancy ratio on the iso-contours of stream line, temperature, and concentration. In addition, the predicted results for both local and average Nusselt and Sherwood numbers are presented and discussed for various parametric conditions. This study was done for 0.1 ≤ Le ≤ 50 and Prandtl number Pr = 0.7. Through out the study the Grashof number and aspect ratio are kept constant at 104and 2 respectively and −10 ≤ N ≤ 10, while Richardson number has been varied from 0.01 to 10 to simulate forced convection dominated flow, mixed convection and natural convection dominated flow.