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Journal of Flow Visualization and Image Processing

Published 4 issues per year

ISSN Print: 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

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BUBBLE BOUNDARY LAYER FORMED BY SIDE GAS INJECTION IN LADLE SYSTEMS WITH THROUGHFLOW

Volume 11, Issue 1, 2004, 14 pages
DOI: 10.1615/JFlowVisImageProc.v11.i1.20
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ABSTRACT

The present study employs an air—water cold model to simulate a gas-stirred ladle system with throughflow in a novel steel—making process. The bubble boundary layer is formed by the injection of air through a nozzle installed on an unheated vertical wall into a recirculating flow. Flow visualization by means of direct photography of the two-phase flow region is performed while the depth of the nozzle and the rate of air injection are varied. The bubble boundary-layer thickness is determined which is the distance from the surface to a locus separating the single-phase core in the recirculating flow from the bubble boundary. Both the growth rate and the local average ascending velocity of bubbles in the boundary layer are also measured and their empirical formulas are derived. In addition, five dimensionless parameters governing bubble growth are identified as gas Reynolds number, viscosity ratio, buoyancy number, Weber number, and Froude number. An empirical equation is derived to correlate the experimental data for the bubble boundary-layer thickness. It is disclosed that for all gas injection rates, each bubble boundary layer resembles the hydrodynamic boundary in natural convection over a heated vertical plate.

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