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Wavelet investigation of coherent structures behind permeable rib

Panigrahi, Pradipta K. and Schröder, Andreas and Kompenhans, Jürgen (2004) Wavelet investigation of coherent structures behind permeable rib. In: WSEAS TRANSACTIONS on SYSTEMS, Vol. 3 (10), pp. 3104-3107. 4th WSEAS International Conference on WAVELET ANALYSIS and MULTIRATE SYSTEMS, 2004-12-29 - 2004-12-31, Vouliagmeni, Athens, Greece. ISSN 1109-2777

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Official URL: http://www.wseas.org http://www.worldses.org/journals

Abstract

The stereo particle image velocimetry (PIV) technique has been used for the study of the turbulent flow behind surface mounted permeable ribs. The opening inside the rib termed here as slit and an obstruction within the slit known as splitter has been implemented to modify the vortical structures. The coherent structures have been studied using different vortex identification schemes i.e. vorticity, eigen value and the invariant of the velocity gradient tensor. The wavelet transform has been applied to the velocity and coherent structures identifiers field. It is observed that the wavelet transform is a successful tool to improve the signal to noise ratio during the vortex identification, remove the outliers due to PIV processing and determination of the large scale coherent flow field.

Document Type:Conference or Workshop Item (Paper)
Additional Information: LIDO-Berichtsjahr=2006 monograph_id=Volume 3,
Title:Wavelet investigation of coherent structures behind permeable rib
Authors:
AuthorsInstitution or Email of Authors
Panigrahi, Pradipta K.UNSPECIFIED
Schröder, AndreasUNSPECIFIED
Kompenhans, JürgenUNSPECIFIED
Date:2004
Journal or Publication Title:WSEAS TRANSACTIONS on SYSTEMS
Refereed publication:Yes
In ISI Web of Science:No
Volume:Vol. 3
Page Range:pp. 3104-3107
Editors:
EditorsEmail
WSEAS, UNSPECIFIED
ISSN:1109-2777
Status:Published
Keywords:Stereo PIV, Wavelets, Turbulent flow, Permeable rib, Vortex, Large scale, Small scale
Event Title:4th WSEAS International Conference on WAVELET ANALYSIS and MULTIRATE SYSTEMS
Event Location:Vouliagmeni, Athens, Greece
Event Type:international Conference
Event Dates:2004-12-29 - 2004-12-31
Organizer:WSEAS
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Aeronautics
HGF - Program Themes:Aircraft Research
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Flight Physics
Location: Göttingen
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Experimental Methods
Deposited By: Ilka Micknaus
Deposited On:13 Apr 2006
Last Modified:14 Jan 2010 19:39

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