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Mixed convection in inclined channels with localized heating blocks

机译：带有局部加热块的倾斜通道中的混合对流

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摘要

The two-dimensional mixed convection heat transfer in inclined channels containing two heating rectangular sources is numerically studied using the Navier-Stokes equations with the Boussinesq approximation. Results in terms of streamlines, isotherms and heat transfer rate are presented for different combinations of the governing parameters, namely, the relative height of the sources (1/8 ≤ B ≤ 1/2), the Prandtl number (0.01 ≤ PΥ ≤ 5), the Reynolds number (10 <≤Re ≤ 50), the inclination of the channel with respect to the horizontal surface (0°≤ Φ ≤ 90°) and the Rayleigh number (10~3 ≤ Ra ≤ 2 × 10~5). The ratio Qce = Q_c/Q_e of the heat quantities, leaving the channel through the cold wall, Q_c, and through the exit, Q_e, is presented to identify the most favorable issue to the heat transfer in the studied configuration. The results obtained show that it is possible to control the heat evacuation through the cold wall and the exit of the channel by choosing adequate combinations of the governing parameters.
机译：使用带有Boussinesq近似的Navier-Stokes方程，对包含两个加热矩形源的倾斜通道中的二维混合对流传热进行了数值研究。给出了控制参数不同组合的流线，等温线和传热速率方面的结果，即源的相对高度（1/8≤B≤1/2），普朗特数（0.01≤PΥ≤5） ），雷诺数（10 <≤Re≤50），通道相对于水平面的倾斜度（0°≤Φ≤90°）和瑞利数（10〜3≤Ra≤2×10〜5 ）。热量之比Qce = Q_c / Q_e，表示通过冷壁Q_c离开出口并通过出口Q_e离开通道，以确定研究构造中最有利于传热的问题。所获得的结果表明，可以通过选择适当的控制参数组合来控制通过冷壁和通道出口的热量排放。

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