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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

GENERATION MECHANISM OF UNIDIRECTIONAL FLOW

巻 13, 発行 2, 2006, pp. 113-132
DOI: 10.1615/JFlowVisImageProc.v13.i2.20
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要約

It is widely known that a unidirectional flow is generated in the avian lung during a breathing process. Though the unidirectional flow should be caused by a kind of an aerodynamic valve, its generation mechanism is not fully understood. In the present study, therefore, the oscillatory flow field in a right-angle branched tube, that was a bifurcation model of the avian trachea, was visualized and analyzed both experimentally and numerically to reveal the mechanisms of the unidirectional flow. The experimental results showed that a separation vortex observed at the entrance of a side-daughter tube played an important role for generation of the unidirectional net flow. The convective inertia was also suggested to be important in the process. From the numerical simulation, the details of the flow mechanism were revealed. The inertia force was found to drive the unidirectional flow during the whole period of oscillation. A good correlation was found between the pressure drop in the branched tube due to the separation vortex and the induced velocity of the unidirectional flow.

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