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Analysis and numerical modeling of subcooled boiling in energy systems in vertical porous channel
Journal of Thermal Analysis and Calorimetry ( IF 4.4 ) Pub Date : 2020-08-03 , DOI: 10.1007/s10973-020-10073-7
Mohammad Yaghoub Abdollahzadeh Jamalabadi

Boiling phenomena are interested in many fields of engineering such as piping and cooling electronic systems. Usually, the phase change through the heat transfer process is avoided as it makes the fluid flow unstable and complex. In the current study, the effect of using porous media in the channel to control the thermo-hydraulic characteristics of the system is studied. To do this aim a steady-state one-dimensional system of equations is solved by numerical method. The gas and liquid Navier–Stokes equations coupled with energy equations are solved simultaneously. The developed method validated with a well-known benchmark problem and the comparison shows a good agreement. The results show that Sauter bubble diameter, forces on the cross-sectional area of fluid, Froude number, fluid wall forces, velocity of mixture, Reynolds number of vapor, fluid velocity, square root of Froude number divided by Weber number, base volume fraction, vapor volume portion, maximum vapor volume portion, critical vapor volume fraction decrease by an increase in Darcy forces, while mean root square of the applied force over the cross section of fluid and heat transported by thermal radiation increased by an increase in Darcy friction up to 1000. The porous media parameters have negligible effects on Eötvös number, speed of sound, liquid Reynolds number, bubble departure frequency, convection heat transfer coefficient, and critical pipe diameter.



中文翻译:

垂直多孔通道能量系统中过冷沸腾的分析和数值模型

沸腾现象在许多工程领域中都引起关注,例如管道和冷却电子系统。通常,避免通过传热过程的相变,因为这会使流体流动不稳定和复杂。在当前的研究中,研究了在通道中使用多孔介质来控制系统的热工液压特性的效果。为此,采用数值方法求解稳态一维方程组。气体和液体Navier–Stokes方程与能量方程的同时求解。所开发的方法通过一个著名的基准问题进行了验证,并且比较结果显示出良好的一致性。结果表明,索特尔气泡直径,流体截面积上的力,弗洛德数,流体壁力,混合物速度,蒸气的雷诺数,

更新日期:2020-08-03
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