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Journal of Flow Visualization and Image Processing

Publication de 4  numéros par an

ISSN Imprimer: 1065-3090

ISSN En ligne: 1940-4336

The Impact Factor measures the average number of citations received in a particular year by papers published in the journal during the two preceding years. 2017 Journal Citation Reports (Clarivate Analytics, 2018) IF: 0.6 The Immediacy Index is the average number of times an article is cited in the year it is published. The journal Immediacy Index indicates how quickly articles in a journal are cited. Immediacy Index: 0.6 The Eigenfactor score, developed by Jevin West and Carl Bergstrom at the University of Washington, is a rating of the total importance of a scientific journal. Journals are rated according to the number of incoming citations, with citations from highly ranked journals weighted to make a larger contribution to the eigenfactor than those from poorly ranked journals. Eigenfactor: 0.00013 The Journal Citation Indicator (JCI) is a single measurement of the field-normalized citation impact of journals in the Web of Science Core Collection across disciplines. The key words here are that the metric is normalized and cross-disciplinary. JCI: 0.14 SJR: 0.201 SNIP: 0.313 CiteScore™:: 1.2 H-Index: 13

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IMAGE ANALYSIS OF INTERNAL FLOW IN GROOVED-CHANNEL HEAT TRANSPORT DEVICE WITH PHASE CHANGE

Volume 25, Numéro 2, 2018, pp. 47-64
DOI: 10.1615/JFlowVisImageProc.2018021253
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RÉSUMÉ

Recent advancement in the design of electronic devices necessitates effective cooling methods due to their high performance, small size, and high-density packaging. As compared with conventional heat pipes, Oscillating Heat Pipe (OHP) and Parallel-Tube Heat transport device (PTH) show higher heat-transport efficiency because of spontaneous internal flow convecting both sensible and latent heats. OHP consists of a meandering tube, whereas PTH consists of multiple tubes and two headers. When a certain level of temperature difference is applied between both ends, self-oscillating flow of liquid and vapor with phase change occurs in the OHP/PTH. So far many studies have been performed for OHP and some for PTH. However, the relation between the two-phase internal flow pattern and heat transport rate has not been quantitatively clarified as yet. In this study, in order to highlight the difference between OHP and PTH, simultaneous measurements of heat transport rate and internal flow pattern were performed for them with two working fluids (ethanol and FC-72). In the present results, when the heat transport rate was increased, the amplitude of the oscillating flow was increased so as for the internal flow from the bottom heating section to reach the top cooling section. At the highest heat transport rate, unidirectional flow component with some oscillating flow resulted in fixed upward/downward flows in each straight section except for the case of PTH with ethanol. The higher degree of freedom forthe internal flow caused by the headers of PTH resulted in the higher performance in PTH than in OHP.

CITÉ PAR
  1. KOYAMA Ryo, INOKUMA Kento, MURATA Akira, IWAMOTO Kaoru, SAITO Hiroshi, Machine learning-based prediction of heat transport performance in oscillating heat pipe, Journal of Thermal Science and Technology, 17, 1, 2022. Crossref

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