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http://hdl.handle.net/10397/88678
Title: | Comparison between the Q criterion and Rortex in the application of an in-stream structure | Authors: | Zhan, JM Li, YT Wai, WHO Hu, WQ |
Issue Date: | 1-Dec-2019 | Source: | Physics of fluids, 1 Dec. 2019, v. 31, no. 12, 121701, p. 121701-1-121701-8 | Abstract: | A newly proposed vortex identification method, namely, Rortex, is used to visualize the vortex structures around an in-stream deflector with a large eddy simulation. A comparison with the well-known vortex identification method, the Q criterion, indicates that the Q criterion and Rortex can both capture the main vortex structures in the flow field. However, both the modified Q criterion and the wavelet analysis reveal that Rortex excludes the shear information on the deposited sand surface, while the Q criterion cannot. As a result, Rortex is more suitable for vortex identification. (C) 2019 Author(s). | Publisher: | American Institute of Physics | Journal: | Physics of fluids | ISSN: | 1070-6631 | EISSN: | 1089-7666 | DOI: | 10.1063/1.5124245 | Rights: | © 2019 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). The following publication J. M. Zhan et al., Phys. Fluids 31, 121701 (2019) is available at https://dx.doi.org/10.1063/1.5124245 |
Appears in Collections: | Journal/Magazine Article |
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File | Description | Size | Format | |
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Zhan_Comparison_Q_Criterion.pdf | 7.77 MB | Adobe PDF | View/Open |
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