具有垂直壁的方形腔内的自然对流受到周期性温度的影响

Btissam Abourida, Mohammed Hasnaoui, Samira Douamna
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引用次数: 15

摘要

采用数值模拟方法研究了不同加热方式下方形腔体垂直壁面的层流自然对流。加热壁面的温度随时间呈正弦变化,而对面垂直壁面的温度要么保持不变,要么随时间呈正弦变化。研究参数为变温振幅(s)(0≤a≤0.8)、变温周期(0.001≤τ <1)、瑞利数(104≤Ra≤106)和普朗特数(Pr = 0.7)。对于这些参数的适当组合,两个施加温度随时间的变化提供了通过空腔冷边界控制传热的可能性。
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Convection naturelle dans une cavité carrée avec des parois verticales soumises à des températures périodiques

The laminar natural convection in a square cavity submitted to different heating modes on its vertical walls, is investigated numerically. The temperature of the heated wall is varied sinusoidally with time while the temperature of the opposite vertical wall is either maintained constant or varied sinusoidally with time. The parameters of the study are the amplitude of the variable temperature(s) (0 ≤ a ≤ 0.8), its (their) period (0.001 ≤ τ < 1), the Rayleigh number (104Ra ≤ 106) and the Prandtl number (Pr = 0.7). For adequate combinations of these parameters, the variation with time of the two imposed temperatures gives the possibility to control the heat transfer through the cold boundary of the cavity.

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