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Development of non-dimensional two phase heat transfer correlation based on physics of boiling
International Journal of Thermal Sciences ( IF 4.5 ) Pub Date : 2020-10-01 , DOI: 10.1016/j.ijthermalsci.2020.106433
Rajiva Lochan Mohanty , Mihir Kumar Das

Abstract The present paper discusses a new approach for predicting the nucleate boiling transfer coefficient based on the physics of nucleate boiling at atmospheric pressure under saturated conditions. Therefore, a non-dimensional correlation of the nucleate boiling heat transfer coefficient developed as a function of bubble departure diameter, active nucleation site density, and bubble departure frequency. A non-dimensional correlation using non-dimensional numbers such as Bond number (Bo), Prandtl number (Pr), Capillary number (Ca), and Jakob number (Ja) is proposed to predict nucleate boiling heat transfer coefficient. The Buckingham π-theorem is used to develop these non-dimensional numbers. The developed non-dimensional correlation of the bubble departure diameter (Bo) and frequency (Ca*) found to predict the present and experimental data of other investigator within an error of ±12% and ±15%, respectively. The non-dimensional nucleate boiling heat transfer coefficient (Nu) correlation based on the non-dimensional numbers found to predict own and other experimental data within an error of ±15%. The result shows the interdependency of bubble dynamic parameters to predict the nucleate boiling heat transfer coefficient.

中文翻译:

基于沸腾物理的无量纲两相传热关系式发展

摘要 本文基于饱和条件下大气压下核沸腾的物理学,讨论了一种预测核沸腾转移系数的新方法。因此,成核沸腾传热系数的无量纲相关性发展为气泡离开直径、活性成核点密度和气泡离开频率的函数。提出了使用无量纲数(例如邦德数 (Bo)、普朗特数 (Pr)、毛​​细管数 (Ca) 和雅各布数 (Ja))的无量纲相关性来预测核沸腾传热系数。白金汉 π 定理用于开发这些无量纲数。发现气泡离开直径 (Bo) 和频率 (Ca*) 的发展无量纲相关性可以分别在 ±12% 和 ±15% 的误差内预测其他调查员的当前数据和实验数据。无量纲核沸腾传热系数 (Nu) 相关性基于发现的无量纲数,预测自身和其他实验数据的误差在 ±15% 以内。结果表明,气泡动力学参数相互依赖,可以预测核沸腾传热系数。
更新日期:2020-10-01
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