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Application potential of advanced PIV algorithms for industrial applications

Willert, Christian (2004) Application potential of advanced PIV algorithms for industrial applications. In: Proceedings of the Workshop on Applications of Particle Image Velocimetry to Naval and Industrial Hydrodynamics. INSEAN. PIVNET2 Workshop on Applications of Particle Image Velocimetry to Naval and Industrial Hydrodynamics, 2004-05-05 - 2005-05-06, Rome (Italy).

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Abstract

Parallel to the increased use of particle image velocimetry in applied research and development, the need for robust processing algorithms capable of reliably tackling an ever increasing spectrum of applications arises. The investigated flows are frequently dominated by high shear rates and/or strong vortices with a high spatial and temporal variation. Traditional PIV processing algorithms relying on a spot-by-spot analysis of the images frequently fall short of recovering the flow field at the spatial resolution offered by the original PIV recording. More advanced algorithms – frequently also referred to as second-order accurate methods – rely on a pyramid-based grid refinement strategy to increase spatial resolution. At the same time iterative deformation schemes are applied to the images to increase the matching efficiency of the correlation-based PIV technique. Whilst the deformation schemes can be applied locally using an interrogation spot at time, the technique of global image deformation based on displacement estimates of prior interrogation passes has proven to be both efficient and highly reliable for a wide range of applications. The presentation will give an overview of a PIV algorithm utilizing these advanced concepts that has been in use at DLR over the past year. Its performance gain in comparison to traditional algorithms will be illustrated using several examples of recent PIV measurements. Estimates concerning the algorithm’s increased processing-cost, its convergence and stability, as well as a few important implementation specific issues are also given.

Document Type:Conference or Workshop Item (Speech)
Title:Application potential of advanced PIV algorithms for industrial applications
Authors:
AuthorsInstitution or Email of Authors
Willert, ChristianUNSPECIFIED
Date:May 2004
Journal or Publication Title:Proceedings of the Workshop on Applications of Particle Image Velocimetry to Naval and Industrial Hydrodynamics
Refereed publication:No
In ISI Web of Science:No
Editors:
EditorsEmail
Di Felice, FabioUNSPECIFIED
Pereira, FranciscoUNSPECIFIED
Publisher:INSEAN
Status:Published
Keywords:particle image velocimetry, PIV, algorithms, data processing
Event Title:PIVNET2 Workshop on Applications of Particle Image Velocimetry to Naval and Industrial Hydrodynamics
Event Location:Rome (Italy)
Event Type:international Conference
Event Dates:2004-05-05 - 2005-05-06
Organizer:INSEAN
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:Propulsion Systems
DLR - Research area:Aeronautics
DLR - Program:L ER - Engine Research
DLR - Research theme (Project):L - Virtual Engine and Validation Methods
Location: Köln-Porz
Institutes and Institutions:Institute of Propulsion Technology > Engine Measurement Systems
Deposited By: Dr.phil. Christian Willert
Deposited On:06 Feb 2006
Last Modified:12 Dec 2013 20:10

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