Comparison between the Q criterion and Rortex in the application of an in-stream structure

Jie Min Zhan; Yu Tian Li; Wing Hong Onyx Wai; Wen Qing Hu

doi:10.1063/1.5124245

Comparison between the Q criterion and Rortex in the application of an in-stream structure

Jie Min Zhan, Yu Tian Li, Wing Hong Onyx Wai, Wen Qing Hu

Research output: Journal article publication › Letter › peer-review

85 Citations (Scopus)

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.

Original language	English
Article number	121701
Journal	Physics of Fluids
Volume	31
Issue number	12
DOIs	https://doi.org/10.1063/1.5124245
Publication status	Published - 1 Dec 2019

ASJC Scopus subject areas

Computational Mechanics
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering
Fluid Flow and Transfer Processes

More information

10.1063/1.5124245

http://hdl.handle.net/10397/88678

Cite this

@article{b23aa423dcf94e7db335f9fd91d24986,

title = "Comparison between the Q criterion and Rortex in the application of an in-stream structure",

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.",

author = "Zhan, {Jie Min} and Li, {Yu Tian} and Wai, {Wing Hong Onyx} and Hu, {Wen Qing}",

year = "2019",

month = dec,

day = "1",

doi = "10.1063/1.5124245",

language = "English",

volume = "31",

journal = "Physics of Fluids",

issn = "1070-6631",

publisher = "American Institute of Physics",

number = "12",

}

TY - JOUR

T1 - Comparison between the Q criterion and Rortex in the application of an in-stream structure

AU - Zhan, Jie Min

AU - Li, Yu Tian

AU - Wai, Wing Hong Onyx

AU - Hu, Wen Qing

PY - 2019/12/1

Y1 - 2019/12/1

N2 - 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.

AB - 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.

UR - http://www.scopus.com/inward/record.url?scp=85076478041&partnerID=8YFLogxK

U2 - 10.1063/1.5124245

DO - 10.1063/1.5124245

M3 - Letter

AN - SCOPUS:85076478041

SN - 1070-6631

VL - 31

JO - Physics of Fluids

JF - Physics of Fluids

IS - 12

M1 - 121701

ER -

Comparison between the Q criterion and Rortex in the application of an in-stream structure

Abstract

ASJC Scopus subject areas

More information

Other files and links

Fingerprint

Cite this