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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. 4th WSEAS International Conference on WAVELET ANALYSIS and MULTIRATE SYSTEMS, 2004-12-29 - 2004-12-31, Vouliagmeni, Athens, Greece.

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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.

Item URL in elib:https://elib.dlr.de/12897/
Document Type:Conference or Workshop Item (Speech)
Additional Information:LIDO-Berichtsjahr=2006
Title:Wavelet investigation of coherent structures behind permeable rib
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Panigrahi, Pradipta K.UNSPECIFIEDUNSPECIFIED
Schröder, Andreasandreas.schroeder (at) dlr.dehttps://orcid.org/0000-0002-6971-9262
Kompenhans, JürgenJuergen.Kompenhans (at) dlr.dehttps://orcid.org/0000-0001-6792-4601
Date:2004
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
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
HGF - Program:Aeronautics
HGF - Program Themes:Aircraft Research (old)
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Flight Physics (old)
Location: Göttingen
Institutes and Institutions:Institute for Aerodynamics and Flow Technology > Experimental Methods, GO
Deposited By: Micknaus, Ilka
Deposited On:13 Apr 2006
Last Modified:16 Jul 2018 14:35

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