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ISSN 打印: 1065-3090

ISSN 在线: 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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CHARACTERISTICS OF INTERSECTING FLOWS IN MULTIPLE DIAMOND-SHAPED ISLANDS

卷 8, 册 2-3, 2001, 12 pages
DOI: 10.1615/JFlowVisImageProc.v8.i2-3.60
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摘要

The author discovered that a separation bubble, generated at the downstream half of each diamond-shaped column, migrated back and forth from one side (left wall) to the other (right wall) because of the Coanda effect. This causes a periodic alternation in the direction of the downward flow stream in the succeeding bifurcation branches, a phenomenon called flip-flop in the sequencing process influidics. The vortices undergo a chain oscillation that results in the occurrence of flip-flop phenomena in the exiting jet flow. An experimental study was performed to investigate X-shaped intersecting flows in multiple diamond-shaped islands. The upstream and downstream apex angle in islands was 30°. The X-shaped flows in intersecting regions were visualized using the fluorescent dye illuminated by a laser light sheet. The velocity variations in their flow fields were measured using two-dimensional laser Doppler veloci-metry (LDV). It is found that the differences in flow patterns depend on the arrangement of the diamond-shaped islands, the Reynolds number, the existence of the turbulence mesh, and row numbers of diamond-shaped islands. This study also clarified the characteristics of velocity variations in the X-shaped intersecting flows in each intersecting region of diamond-shaped islands. The frequency of alternating flow directions is made dimensionless as the Strouhal number, which is correlated against the Reynolds number with the intersecting angle as the parameter. The mechanisms that cause the reciprocating bubble migration in network ducts of diamond-shaped cylinders are explained.

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