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国际流体力学研究期刊

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ISSN 打印: 2152-5102

ISSN 在线: 2152-5110

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: 1.1 To calculate the five year Impact Factor, citations are counted in 2017 to the previous five years and divided by the source items published in the previous five years. 2017 Journal Citation Reports (Clarivate Analytics, 2018) 5-Year IF: 1.3 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: 0.0002 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: 0.33 SJR: 0.256 SNIP: 0.49 CiteScore™:: 2.4 H-Index: 23

Indexed in

The Effect of Wall Groove Numbers on Pressure Drop in Pipe Flows

卷 42, 册 2, 2015, pp. 119-130
DOI: 10.1615/InterJFluidMechRes.v42.i2.30
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摘要

Flow behavior in pipe with rectangular grooves on internal wall surface has been investigated experimentally. The number of grooves was varied to clarify its influence on pressure drop. In this experimental design, dyes were injected from pipe walls and plastic threads attached to internal pipe walls to enable observation of their movements in flowing water. Results show that pipe wall grooves, described as 2n and 2n + 2m did induce pressure drops. When n is the odd positive integer the groove produces weak vortices of low momentum viscous fluid on the wall which diameter is larger than the groove spacing. Therefore, it is swept by large-scale motion from the center of the pipe then pressure drop decreased. However, when n equals to the even positive integer the groove produces energetic small vortices of high viscous fluids that rotates around the pipe wall and induces high momentum fluid from the center of the pipe. As a result, the radial velocity increased as did the pressure drop. m represented the motion that interrupting flow behavior caused by n. When n is the odd positive integer, the vortex behavior represented with m tended to increase the pressure drop produced by n. On the other hand, when n is the even positive integer, m tended to decrease pressure drop produced by n.

对本文的引用
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