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Journal of Flow Visualization and Image Processing

年間 4 号発行

ISSN 印刷: 1065-3090

ISSN オンライン: 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

Indexed in

LASER SPECKLE PHOTOGRAPHY TECHNIQUE FOR MEASURING LOCAL AND GLOBAL HEAT TRANSFER CORRELATION COEFFICIENTS

巻 1, 発行 4, 1993, pp. 359-370
DOI: 10.1615/JFlowVisImageProc.v1.i4.80
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要約

A laser specklegram technique, or, equivalently, speckle photography, is capable of directly measuring local surface temperature gradients providing an extremely high resolution and a full-field interrogation from a single data taking. A complete specklegram system using a 35 mW power He-Ne laser has been developed at Texas A&M University, and the system has been applied to investigate heat transfer characteristics for a common configuration, but under some dispute in determining the heat transfer correlation. Convective heat transfer from an upward-facing isothermal plate has been studied by measuring the local and global Nusselt numbers. An aspect ratio (AR) of 1.75 has been considered in the present case. The Rayleigh number, based on the length scale equivalent to the ratio of the surface area to the perimeter, has varied from 8.5 × 104 to 2.0 × 105. The results have been compared with several previously published calculations and data that employed classical and conventional techniques. The present result for the global heat transfer shows a 0.234 power law, i.e., Nu = 0.46 Ra0.234, correlates the data more properly, whereas previously published predictions and data for infinite or semi-infinite plate exhibit 0.2 power law. For the aspect ratios of order of unity, published correlations indicate that a 0.25 power law fit the data well. It is suggested that the band between 0.25 and 0.2 power correlations should contain the information for horizontal heated plates of AR ranging from 1.0 to showing a gradual decrease in Nusselt number with increasing aspect ratio.

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