Mathematical Modeling of Reverse Processes with Consideration of the Water–Ice Phase Transition

IF 1.3 4区 工程技术 Q3 ENGINEERING, MECHANICAL
I. V. Mezentsev, N. V. Vernikovskaya, P. S. Melkov, S. I. Mezentsev, N. N. Mezentseva
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引用次数: 0

Abstract

The results of mathematical modeling taking into account the phase transition occurring at filtration of air flow through a tubular heat exchanger are presented. The heat exchanger is made of thin-walled plastic tubes (3.2 mm in diameter), filled with water and sealed at both ends. The calculation results qualitatively coincide with the results of experimental studies carried out under natural conditions. The model with consideration of the “water–ice” and “ice–water” phase transitions makes it possible to describe the experimentally observed intersection of time dependences of air temperature in cross sections. This intersection could not be obtained without account of the phase transition in the model. The quantitative difference between the calculation results and the experiment is explained by the choice of insufficiently small value of the relative temperature difference; this parameter needs clarification in further research.

Abstract Image

Abstract Image

考虑水冰相变的逆过程数学建模
摘要 本文介绍了数学建模的结果,其中考虑到了气流通过管式热交换器过滤时发生的相变。热交换器由薄壁塑料管(直径 3.2 毫米)制成,管内充满水,两端密封。计算结果与自然条件下的实验研究结果基本吻合。考虑到 "水-冰 "和 "冰-水 "相变的模型可以描述实验观察到的横截面空气温度随时间变化的交叉点。如果不考虑模型中的相变,就无法获得这种交集。计算结果与实验结果在数量上的差异是由于选择的相对温差值不够小造成的;这一参数需要在进一步的研究中加以澄清。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Journal of Engineering Thermophysics
Journal of Engineering Thermophysics THERMODYNAMICS-ENGINEERING, MECHANICAL
CiteScore
2.30
自引率
12.50%
发文量
0
审稿时长
3 months
期刊介绍: Journal of Engineering Thermophysics is an international peer reviewed journal that publishes original articles. The journal welcomes original articles on thermophysics from all countries in the English language. The journal focuses on experimental work, theory, analysis, and computational studies for better understanding of engineering and environmental aspects of thermophysics. The editorial board encourages the authors to submit papers with emphasis on new scientific aspects in experimental and visualization techniques, mathematical models of thermophysical process, energy, and environmental applications. Journal of Engineering Thermophysics covers all subject matter related to thermophysics, including heat and mass transfer, multiphase flow, conduction, radiation, combustion, thermo-gas dynamics, rarefied gas flow, environmental protection in power engineering, and many others.
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