NDLI: Wavelet multi-resolution analysis of initial condition effects on near-wake turbulent structures

Content Provider	Springer Nature Link
Author	Li, H. Zhou, Y.
Copyright Year	2002
Abstract	The effects of initial conditions on turbulence structures of various scales in a near wake have been investigated for two wake generators with the same characteristic dimension, i.e., a circular cylinder and a screen of 50% solidity, based on the wavelet multi-resolution analysis. The experimental investigation used two orthogonal arrays of sixteen X-wires, eight in the (x, y)-plane, and eight in the (x, z)-plane. Measurements were made atx/h (x is the streamwise distance downstream of the cylinder andh is the height of the wake generator) = 20. The wavelet multi-resolution technique was applied to decomposing the velocity data, obtained in the wakes generated by the two generators, into a number of wavelet components based on the central frequencies. The instantaneous sectional streamlines and vorticity field were thus ‘visualized’ for each wavelet component or central frequency. It was found that the behavior of large- and intermediate-scale structures depend on the initial conditions and the small-scale structures are independent of the initial conditions. The contributions from the wavelet components to the time-averaged Reynolds stresses and vorticity were estimated. Both the large-scale and intermediate longitudinal structures make the most significant contributions to Reynolds stresses in the circular cylinder wake, but the contribution from the large-scale structures appears dominating in the screen wake. The relatively small scale structures of the circular cylinder wake contribute most to the total rms spanwise vorticity.
Starting Page	343
Ending Page	354
Page Count	12
File Format	PDF
ISSN	13438875
Journal	Journal of Visualization
Volume Number	5
Issue Number	4
e-ISSN	18758975
Language	English
Publisher	Springer-Verlag
Publisher Date	2002-01-01
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	orthogonal wavelet transform wavelet multi-resolution analysis initial condition turbulent structure wake Engineering Fluid Dynamics Computer Imaging, Vision, Pattern Recognition and Graphics Classical Continuum Physics Engineering Thermodynamics, Heat and Mass Transfer
Content Type	Text
Resource Type	Article
Subject	Condensed Matter Physics Electrical and Electronic Engineering

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

Combining wavelet transform and POD to analyze wake flow

Visualization of multi-scale turbulent structure in lobed mixing jet using wavelets

Multi-scale analysis on wake structures of asymmetric cylinders with different aspect ratios

Multi-scale vortical structure analysis on large eddy simulation of dune wake flow

Visualization of a turbulent jet using wavelets

5. Visualization of the turbulent jet with two-dimensional discrete wavelet transform

POD analysis of near-wake structures of an elliptic cylinder adjacent to a free surface

POD analysis on the sphere wake at a subcritical Reynolds number

Turbulent pulsed jet

Wavelet multi-resolution analysis of initial condition effects on near-wake turbulent structures

Similar Documents

Combining wavelet transform and POD to analyze wake flow

Visualization of multi-scale turbulent structure in lobed mixing jet using wavelets

Multi-scale analysis on wake structures of asymmetric cylinders with different aspect ratios

Multi-scale vortical structure analysis on large eddy simulation of dune wake flow

Visualization of a turbulent jet using wavelets

5. Visualization of the turbulent jet with two-dimensional discrete wavelet transform

POD analysis of near-wake structures of an elliptic cylinder adjacent to a free surface

POD analysis on the sphere wake at a subcritical Reynolds number

Turbulent pulsed jet

Wavelet multi-resolution analysis of initial condition effects on near-wake turbulent structures