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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

Indexed in

LARGE-SCALE STRUCTURE IDENTIFICATION OF A TURBULENT SPOT BY TAKING BLASIUS VELOCITY PROFILE AS REFERENCE

Volume 3, Issue 2&3, 1996, pp. 177-191
DOI: 10.1615/JFlowVisImageProc.v3.i2-3.60
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ABSTRACT

This paper addresses the large-scale structure identification of an artificially generated turbulent spot that simulates the spontaneous turbulent intermittency in a Blasius boundary layer. The Blasius velocity profile of the laminar boundary layer was taken as a reference to observe the turbulent spot. This differs from the conventional method that takes the wall as a reference. The structure of the spot was identified with the profile of the velocity perturbation that is the deviation of the ensemble-averaged velocity of the interior spot from the velocity of the unperturbed laminar flow surrounding the spot. The velocity perturbations near the central streamline on a y-t plane are taken as a sample to describe the identification method. The identified large-scale structure of the spot is a spanwise vortex moving downstream (forward) and rolling backward in the laminar boundary layer. The streamwise velocity perturbation of the turbulent spot from the experiments is compared with the horizontal velocity component of a vortex numerically generated by a CFD code in order to verify the number of vortices contained in a turbulent spot. Significance of the large-scale structure of turbulent spots is analyzed. The role of turbulent spots under zero and adverse pressure gradients is discussed briefly.

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