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Advanced Evaluation Algorithms for Standard and Dual Plane Particle Image Velocimetry

Ronneberger, O. and Raffel, M. and Kompenhans, J. (1998) Advanced Evaluation Algorithms for Standard and Dual Plane Particle Image Velocimetry. 9th International Symposium on Applications of Laser Techniques to Fluid Mechanics, Lissabon/Portugal, 13.-16. Juli 1998.

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Abstract

The widely-used evaluation algorithms for PIV recording have some short comings, in that they introduce superfluous statistical and systematical errors. For example, they introduce the so-called "peak-locking" effect. These errors can be significantly reduced by using better algorithms. The following considerably improved analysis and algorithms will be described and demonstrated on real PIV recordings: - Analysis of errors of CCD's and the electric transmisson of the video signal. - A FFT-based cross correlation algorithm using completely free-shaped and free-sized interrogation windows which exhibits the same accuracy as an optimally programmed direct correlation. - A Gaussian fit algorithm using different weights for the values in the correlation plane due to the error distribution of correlation coefficients.

Document Type:Conference or Workshop Item (Paper)
Additional Information: LIDO-Berichtsjahr=1999,
Title:Advanced Evaluation Algorithms for Standard and Dual Plane Particle Image Velocimetry
Authors:
AuthorsInstitution or Email of Authors
Ronneberger, O.UNSPECIFIED
Raffel, M.UNSPECIFIED
Kompenhans, J.UNSPECIFIED
Date:1998
Volume:Paper 10.1
Status:Published
Keywords:Particle Image Velocimetry, peak-locking, FFT, correlation, PIV software
Event Title:9th International Symposium on Applications of Laser Techniques to Fluid Mechanics, Lissabon/Portugal, 13.-16. Juli 1998
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Aeronautics
HGF - Program Themes:other
DLR - Research area:Aeronautics
DLR - Program:L ST - Starrflüglertechnologien
DLR - Research theme (Project):UNSPECIFIED
Location: Köln-Porz , Braunschweig , Göttingen
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Institut für Strömungsmechanik
Deposited By: elib DLR-Beauftragter
Deposited On:16 Sep 2005
Last Modified:14 Jan 2010 20:25

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