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Boiling dynamics in parallel minichannel system with different inlet solutions
International Journal of Heat and Mass Transfer ( IF 5.2 ) Pub Date : 2021-02-01 , DOI: 10.1016/j.ijheatmasstransfer.2020.120655
I. Zaborowska , H. Grzybowski , G. Rafałko , R. Mosdorf

Abstract In the paper inlet pressure fluctuations in non-stationary boiling in two parallel minichannels with an inner diameter of 1 mm were considered. The open-loop system with two cases of inlet solutions (common and separate) has been analysed. We conducted an analysis of the similarity of boiling dynamics in neighbouring minichannels. A new approach to multiscale recurrence quantification analysis of pressure fluctuations was proposed. This method of analysis allowed us to detect different types of boiling dynamics during liquid flow, bubble flow, slug flow and wavy annular flow. It has been shown that the type of channels inlet solution affects the character of pressure fluctuations occurring in the system. The conducted analyses have shown that the common inlet solution of minichannels leads to simultaneous flow patterns changes. The separate inlet solution leads to two types of flow patterns changes in minichannels – simultaneous and alternate (shifted in time).

中文翻译:

具有不同入口解决方案的并联微通道系统中的沸腾动力学

摘要 考虑了两个内径为1 mm的平行小通道内非稳态沸腾时纸进口压力的波动。分析了具有两种入口解决方案(公共和分离)的开环系统。我们对相邻小通道中沸腾动力学的相似性进行了分析。提出了一种新的压力波动多尺度递归量化分析方法。这种分析方法使我们能够检测液体流、气泡流、段塞流和波浪环形流期间不同类型的沸腾动力学。已经表明,通道入口溶液的类型会影响系统中发生的压力波动的特征。进行的分析表明,微通道的通用入口解决方案会导致同时的流动模式变化。
更新日期:2021-02-01
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