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The Fully Digital Evaluation of Photographic PIV Recordings

Willert, Chr. (1997) The Fully Digital Evaluation of Photographic PIV Recordings. Applied Scientific Research, pp. 79-102. Kluwer Academic Publishers, P.O.Box 17, 3300 AA Dordrecht.

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Abstract

The performance of a purely digital evaluation system for photographic PIV recordings is described. High resolution digital images are obtained from the 35 mm negatives using a commonly available slide scanner. Together with the continually improving capabilities of standard computers, this evaluation system is a cost effective alternative to the traditional analog optical/digital (Young's fringe method) and purely optical PIV interrogation systems.Compared to the optical systems the fully digital evaluation can provide a higher spatial ressolution while maintaining a similar measurement uncertainty. Using actual PIV recordings absolute measurement uncertainties are obtained and further predictions towardoptimal displacement data recovery are made with the aaid of Monte-Carlo simulations. Measurement uncertainties are minimized for particle image diameters on the order of 2 pixels while the reductionof the image depth (i.e. bits/pixel) has little effect.

Document Type:Article
Additional Information: LIDO-Berichtsjahr=1997,
Title:The Fully Digital Evaluation of Photographic PIV Recordings
Authors:
AuthorsInstitution or Email of Authors
Willert, Chr.UNSPECIFIED
Date:1997
Journal or Publication Title:Applied Scientific Research
Refereed publication:Yes
In ISI Web of Science:Yes
Page Range:pp. 79-102
Publisher:Kluwer Academic Publishers, P.O.Box 17, 3300 AA Dordrecht
Series Name:Vvol. 56
Status:Published
Keywords:particle image velocimetry, high resolution scanner, crosscorrelation, spatial resolution, measurement uncertainty
HGF - Research field:UNSPECIFIED
HGF - Program:Aeronautics
HGF - Program Themes:other
DLR - Research area:UNSPECIFIED
DLR - Program:L SI - Versuchs- und Simulationstechniken
DLR - Research theme (Project):UNSPECIFIED
Location: Köln-Porz , Braunschweig , Göttingen
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Institut für Strömungsmechanik > Institut für Experimentelle Strömungsmechanik
Deposited By: elib DLR-Beauftragter
Deposited On:03 Apr 2006
Last Modified:27 Apr 2009 10:09

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