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Journal of Flow Visualization and Image Processing

Erscheint 4 Ausgaben pro Jahr

ISSN Druckformat: 1065-3090

ISSN Online: 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

FLOW THROUGH RECTANGULAR CYLINDER BUNDLES

Volumen 5, Ausgabe 2, 1998, pp. 167-186
DOI: 10.1615/JFlowVisImageProc.v5.i2.70
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ABSTRAKT

An experimental study is conducted to investigate flow characteristics in rectangular cylinder bundles placed in staggered and in-lined arrangements. Two sets of cylinder bundles, three-row and multiple-row, are tested. Flow visualization by means of a tracer injection method determines flow patterns, while (he laser Doppler velocimetry is employed to obtain the distributions of velocity vector, vorticity, turbulence intensity, and Reynolds stress. A new physical parameter, named “arrangement intersecting angle,” is proposed to replace the longitudinal and lateral pitches in describing the geometrical features of cylinder bundles in staggered and in-lined arrangements. Two kinds of vortex, separation and impinging-jet vortices, are identified, and their roles in flow behavior are determined by observing flow through the bundles. Of particular interest is the disclosure of flip-flop phenomena, i.e., oscillations of exit streams from the bundles. It is found that these oscillations originate in the second row and are amplified downstreamwise along the flow. The dimensionless optimum frequency of these oscillations, the Strouhal number, is approximately constant at 0.017−0.03 in the range of the Reynolds numbers tested, 3,000 to 15,000. This is an order of magnitude lower than the oscillations of von Karman vortex street behind a single circular cylinder.

REFERENZIERT VON
  1. SAKANISHI Shyunichi, UMEDA Shinzaburo, YANG Wen-Jei, Visualization of X-shaped Intersecting Flows in Multiple Diamond-shaped Islands, Transactions of the Visualization Society of Japan, 21, 3, 2001. Crossref

  2. UMEDA Shinzaburo, YANG Wen-Jei, KANBARA Hidetomo, Characteristics of Wake Flows behind a Diamond-shaped Cylinder, Transactions of the Visualization Society of Japan, 21, 3, 2001. Crossref

  3. HASEGAWA Seizo, UMEDA Shinzaburo, TANIGUCHI Akira, YANG Wen-Jei, Flow Visualization by Means of PIV in a Diamond-Shaped Cylinder Bundle, Transaction of the Visualization Society of Japan, 24, 11, 2004. Crossref

  4. Takemoto Yukio, Kawanishi Keiji, Mizushima Jiro, Heat transfer in the flow through a bundle of tubes and transitions of the flow, International Journal of Heat and Mass Transfer, 53, 23-24, 2010. Crossref

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