Recently a new μPIV interrogation algorithm has been proposed in which the interrogation window size is reduced to a single pixel. Such small interrogation window sizes are possible using correlation averaging to increase the effective particle concentration to levels required for correlation analysis to succeed. The random error exhibits the expected behavior of decreasing roughly in proportion to N−1/2 while the bias error exhibits unexpected peak-locking behavior with zero bias error at integer and half integer pixel displacements and maximal errors at one-quarter and three-quarter pixel displacements. Accompanying experiments show the potential of this technique but have not yet been sufficiently refined to confirm this unexpected bias error behavior.
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ASME 2005 International Mechanical Engineering Congress and Exposition
November 5–11, 2005
Orlando, Florida, USA
Conference Sponsors:
- Fluids Engineering Division
ISBN:
0-7918-4219-3
PROCEEDINGS PAPER
Single Pixel Evaluation of Microchannel Flows
Carl Meinhart,
Carl Meinhart
University of California at Santa Barbara
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Derek Tretheway,
Derek Tretheway
Portland State University
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Arjun Sud
Arjun Sud
Purdue University
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Steve Wereley
Purdue University
Carl Meinhart
University of California at Santa Barbara
Lichuan Gui
University of Mississippi
Derek Tretheway
Portland State University
Arjun Sud
Purdue University
Paper No:
IMECE2005-83065, pp. 375-380; 6 pages
Published Online:
February 5, 2008
Citation
Wereley, S, Meinhart, C, Gui, L, Tretheway, D, & Sud, A. "Single Pixel Evaluation of Microchannel Flows." Proceedings of the ASME 2005 International Mechanical Engineering Congress and Exposition. Fluids Engineering. Orlando, Florida, USA. November 5–11, 2005. pp. 375-380. ASME. https://doi.org/10.1115/IMECE2005-83065
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