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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-VISUALIZATION OF A TWO SIDE-BY-SIDE CYLINDER WAKE

Volumen 9, Ausgabe 2&3, 2002, 16 pages
DOI: 10.1615/JFlowVisImageProc.v9.i2-3.30
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ABSTRAKT

The near-wake of two side-by-side circular cylinders was studied using the laser-illuminated flow-visualization technique. Three T/d values, i.e., 3.00, 1.70, and 1.13, were investigated, where T is the centre-to-centre cylinder spacing and d is the cylinder diameter; they represent three typical flow regimes. The vortex formation, topology and downstream evolution are discussed in detail. At T/d = 3.00, two vortex streets are observed behind the cylinders. The two streets are predominantly symmetrical about the flow centreline. As T/d reduces to 1.70, the gap flow between the cylinders is deflected, forming one narrow and one wide wake behind the cylinders. The deflected gap flow is bi-stable, as previously reported. One interesting observation was made, that is, an exceptionally large gap vortex occurred and subsequently triggered the changeover of the gap flow deflection from one side to another. A new explanation is therefore proposed for the bi-stable gap flow deflection. At T/d = 1.13, the two cylinders acted like a single bluff body, resulting in one single Karman vortex street. Nevertheless, they are different from a single structure. The gap bleeding is unequivocally identifiable and could play a role in determining the vortex pattern. The bleeding is mostly biased towards one cylinder. This is associated with vortices shed alternately from the outer side of the two cylinders. On the other hand, the symmetric vortex shedding occurs when the bleeding was unbiased.

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