NDLI: Three-dimensional vorticity in a turbulent cylinder wake

Content Provider	Springer Nature Link
Author	Zhou, T. Zhou, Y. Yiu, M. W. Chua, L. P.
Copyright Year	2003
Abstract	The three components of the vorticity vector in the intermediate region of a turbulent cylinder wake were measured simultaneously using a multi-hot-wire probe. This probe has an improved spatial resolution compared with those reported in the literature. The behavior of the instantaneous velocity and vorticity signals is examined. Both coherent and incoherent vorticity fields are investigated using a phase-averaged technique. The iso-contours of the phase-averaged longitudinal and lateral vorticity variances, $$ { < \omega ^{2}_{{\rm{x}}} > } $$ and $$ { < \omega ^{2}_{{\rm{y}}} > } $$ , wrap around the spanwise structures of opposite sign and run through the saddle point along the diverging separatrix. The observation conforms to the previous reports of the occurrence of the longitudinal structures based on flow visualizations and numerical simulations. The magnitude of these contours is about the same as that of the maximum coherent spanwise vorticity at the vortex center, indicating that the strength of the longitudinal structures is comparable to that of the spanwise vortices. Furthermore, $$ { < \omega ^{2}_{{\rm{x}}} > } $$ and $$ { < \omega ^{2}_{{\rm{y}}} > } $$ exhibit maximum concentration away from the vortex center, probably because of a combined effect of the large-scale spanwise vortices and the intermediate-scale longitudinal structures. Coherent structures contribute about 36% to the spanwise vorticity variance at x/d=10. The contribution decreases rapidly to about 5% at x/d=40. The present results suggest that vorticity largely reside in relatively small-scale structures.
Starting Page	459
Ending Page	471
Page Count	13
File Format	PDF
ISSN	07234864
Journal	Experiments in Fluids
Volume Number	35
Issue Number	5
e-ISSN	14321114
Language	English
Publisher	Springer-Verlag
Publisher Date	2003-09-19
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Content Type	Text
Resource Type	Article
Subject	Fluid Flow and Transfer Processes Physics and Astronomy Mechanics of Materials Computational Mechanics

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

Three-dimensional vorticity in a turbulent cylinder wake

Performance of a three-component vorticity probe in a turbulent far-wake

Three-dimensional vorticity patterns of cylinder wakes

An experimental study on unsteady turbulent near wake of a rectangular cylinder in channel flow

Turbulent flow around a rotating cylinder in a quiescent fluid

Investigation of the three-dimensional intermediate wake topology for a square cylinder at high Reynolds number

Approach to local axisymmetry in a turbulent cylinder wake

Performance of a transverse vorticity probe in a turbulent channel flow

Comparison between velocity- and vorticity-based POD methods in a turbulent wake

Three-dimensional vorticity in a turbulent cylinder wake

Similar Documents

Three-dimensional vorticity in a turbulent cylinder wake

Performance of a three-component vorticity probe in a turbulent far-wake

Three-dimensional vorticity patterns of cylinder wakes

An experimental study on unsteady turbulent near wake of a rectangular cylinder in channel flow

Turbulent flow around a rotating cylinder in a quiescent fluid

Investigation of the three-dimensional intermediate wake topology for a square cylinder at high Reynolds number

Approach to local axisymmetry in a turbulent cylinder wake

Performance of a transverse vorticity probe in a turbulent channel flow

Comparison between velocity- and vorticity-based POD methods in a turbulent wake

Three-dimensional vorticity in a turbulent cylinder wake