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Efficient second-order PIV algorithm using full image deformation

Willert, Christian (2005) Efficient second-order PIV algorithm using full image deformation. Worldwide PIV-Challenge 2005, 2005-09-19 - 2005-09-20, Pasadena, CA (USA).

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Abstract

The algorithm used by DLR for the PIV-Challenges 2003 and 2005 features a combination of pyramid-based grid refinement (multi-grid) and full-field image deformation and is intended to give second-order accurate displacement data. At its core a standard FFT-based correlation algorithm provides local image shift data. This displacement data is used to deform the original images after each iteration. Special emphasis was placed on striking a balance between accuracy, robustness and processing speed. The specific characteristics of this algorithm, whose flowchart is shown on the right, are explained in the following sections. Visual inspection of the processed data was found very useful in the proper choice of PIV processing parameters and optional image filtering. The most advanced schemes do not necessarily achieve the highest precision as they may introduce undesired artifacts.

Document Type:Conference or Workshop Item (Poster)
Title:Efficient second-order PIV algorithm using full image deformation
Authors:
AuthorsInstitution or Email of Authors
Willert, ChristianUNSPECIFIED
Date:September 2005
Refereed publication:No
In ISI Web of Science:No
Status:Published
Keywords:particle image velocimetry, algorithm, PIV, B-splines, interpolation
Event Title:Worldwide PIV-Challenge 2005
Event Location:Pasadena, CA (USA)
Event Type:international Conference
Event Dates:2005-09-19 - 2005-09-20
Organizer:California Institute of Technology
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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