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Effect of temperature modulation on natural convection in a horizontal porous annulus
International Journal of Thermal Sciences ( IF 4.5 ) Pub Date : 2020-05-01 , DOI: 10.1016/j.ijthermalsci.2020.106273
Jabrane Belabid , Karam Allali

Abstract The effect of temperature modulation on natural convection in a horizontal porous annulus is investigated in this paper. The porous medium is confined between the inner and outer cylinders of the annulus which is subjected to time-dependent temperature. It is assumed that the time-dependent modulation is periodic with frequency σ and amplitude λ. The model consists of the heat equation and the equations of motion under the Darcy law. The derived problem with the stream function-temperature formulation is solved numerically using the alternating direction implicit method. It is shown that a stabilizing effect can be gained for appropriate values of the frequency σ and the amplitude λ.

中文翻译:

温度调制对水平多孔环空自然对流的影响

摘要 本文研究了温度调制对水平多孔环空自然对流的影响。多孔介质被限制在环空的内圆柱和外圆柱之间,该圆柱受到与时间有关的温度。假设时间相关调制是周期性的,频率为 σ,幅度为 λ。该模型由热方程和达西定律下的运动方程组成。使用交替方向隐式方法数值求解流函数-温度公式的导出问题。结果表明,对于适当的频率 σ 和幅度 λ 值,可以获得稳定效果。
更新日期:2020-05-01
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