Correlation for the cooling process of vertical storage tanks under natural convection for high Prandtl number
Correlation for the cooling process of vertical storage tanks under natural convection for high Prandtl number
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DOI：
10.1016/j.ijheatmasstransfer.2012.10.038
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发表时间：
2013-01
影响因子：
5.2
通讯作者：
R. Oliveski
中科院分区：
文献类型：
--
作者：
R. Oliveski
提出了一个新的无量纲的努塞尔数和高普朗特数的关联式。它可用于校正通过全局方法获得的温度分布。数学模型是瞬态二维的，假设层流。考虑了所有罐壁的热损失。几个冷却情况下，模拟不同的长宽比，冷却速率和体积的坦克。温度场被用来获得内部传热系数。利用白金汉定理确定了表征冷却过程的无因次群。相关性与数值模拟结果进行了检验，吻合良好。
A new dimensionless correlation for the Nusselt number and high Prandtl number is presented. It can be used to correct the temperature profiles obtained through a global method. The mathematical model is transient two-dimensional, assuming laminar flow. Thermal losses are considered for all tank walls. Several cooling cases are simulated varying the aspect ratio, the cooling rate and the volume of the tank. The temperature fields are used to obtain the internal coefficient of heat transfer. It was use the Buckingham theorem to determine the dimensionless groups that represent the cooling process. The correlation is checked with numerical simulations results with good agreement.