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Comparison between the Q criterion and Rortex in the application of an in-stream structure
Applied Physics Reviews ( IF 12.750 ) Pub Date : 2019-12-05 , DOI: 10.1063/1.5124245
Jie-min Zhan; Yu-tian Li; Wing-hong Onyx Wai; Wen-qing Hu

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.
更新日期:2019-12-31

 

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