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Role of magnetic field and cavity inclination on double diffusive mixed convection in rectangular enclosed domain
International Communications in Heat and Mass Transfer ( IF 7 ) Pub Date : 2020-11-01 , DOI: 10.1016/j.icheatmasstransfer.2020.104814
Shivananda Moolya , A. Satheesh

Abstract Effect of uniform magnetic field on double-diffusive mixed convection in a rectangular inclined domain of aspect ratio (A) as 2.0 is analyzed using finite volume technique. The computation conditions selected for this study are Hartmann number (0 ≤ Ha ≤ 50), cavity inclination angle (0° ≤ γ ≤ 90°), Buoyancy ratio (N = 1.0 and − 1.0), and Richardson number (0.1 ≤ Ri ≤ 10). The Prandtl number (Pr = 0.7), Lewis number (Le = 5.0) and Reynolds number (Re = 1000) are constant. The obtained temperature, concentration, and streamline contours by studying the above parameters are discussed in detail. The heat and mass transfer rates are analyzed using local and average Nusselt numbers (Nu), and Sherwood number (Sh) on the top wall. Results show that the heat and mass transfer rates are increased with an inclination angle and decreased with an increase in Ha. For non-zero Ha, the optimum cavity angle is observed to be 60° for N = 1.0 to achieve better convection rate, whereas, for N = −1.0, the optimum cavity angle is found to be 30°.

中文翻译:

磁场和腔倾角对矩形封闭域双扩散混合对流的作用

摘要 利用有限体积技术分析了均匀磁场对纵横比(A)为2.0的矩形倾斜域中双扩散混合对流的影响。本研究选择的计算条件是哈特曼数 (0 ≤ Ha ≤ 50)、腔倾角 (0° ≤ γ ≤ 90°)、浮力比 (N = 1.0 和 − 1.0) 和理查森数 (0.1 ≤ Ri ≤ 10)。普朗特数 (Pr = 0.7)、路易斯数 (Le = 5.0) 和雷诺数 (Re = 1000) 是常数。详细讨论了通过研究上述参数获得的温度、浓度和流线等值线。使用顶壁上的局部和平均努塞尔数 (Nu) 和舍伍德数 (Sh) 分析传热和传质速率。结果表明,传热和传质速率随着倾斜角的增加而增加,随着 Ha 的增加而减少。对于非零 Ha,观察到最佳腔角为 60°,N = 1.0 以实现更好的对流率,而对于 N = -1.0,发现最佳腔角为 30°。
更新日期:2020-11-01
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