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ISSN 打印: 2169-2785

ISSN 在线: 2167-857X

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: 0.5 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: 0.8 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: 0.2 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: 0.00018 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: 0.11 SJR: 0.286 SNIP: 1.032 CiteScore™:: 1.6 H-Index: 10

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THE BUBBLY WALL SHEAR STRESS IN A VERTICAL UPWARD LAMINAR TUBE FLOW

卷 6, 册 2, 2018, pp. 99-114
DOI: 10.1615/InterfacPhenomHeatTransfer.2018021444
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摘要

The results of experimental investigation of upward laminar flow with bubbles are presented. An electrodiffusional technique is used to detect perturbation of the wall shear stress caused by bubbles in the tube flow. A bubble generator based on the flow focusing technique has been developed for production of a submillimeter monodispersed bubbles mixture. It is proven that submillimeter bubbles significantly increase the flow mass transfer: the smaller the bubble diameter, the greater is the wall shear stress. Some peculiarities of the interaction are the detection of inherent liquid turbulence and pseudoturbulence induced by bubbles. It is shown that the additivity of pseudoturbulence and inherent liquid pulsations is fulfilled only for Reb > 100, when for some smaller Reb values this is not valid. The shear stress perturbations by single bubbles have complex structure. It is possible to define three components of perturbation caused by a single small bubble. The perturbation by a Taylor bubble contains only two components due to the main flow symmetry around the bubble. An unexpectedly long shear stress pulsation zone is registered behind single small almost spherical bubbles and Taylor bubbles.

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