Investigation of relative importance of some error sources in particle image velocimetry

Jeff Harris, Barton L. Smith, Brandon Wilson

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    2 Scopus citations

    Abstract

    Several error sources are analyzed for 2-component PIV, including: calibration, magnification variation, perspective, resolution, and the correlation algorithm noise floor. Several of these error sources are compared with previously published estimates. New experimental data and methods for measuring the contribution of each source to velocity uncertainty are presented. The calibration uncertainty on the velocity measurement was found to be small (so long as reasonable care is taken in the calibration) and independent of the calibration target for a 2-component PIV setup. The perspective error and magnification variation were both calculated and experimentally found to be small. The light sheet thickness only has an effect when the thickness is greater than 1% of the distance from the light sheet to the camera lens plane. The spatial resolution may be so coarse as to not capture the smaller eddies in the flow, thus attenuating the measured fluctuations. The noise floor was found to contribute significantly to the uncertainty in the velocity measurements in sub-pixel displacement.

    Original languageEnglish (US)
    Title of host publicationASME 2012 Fluids Engineering Division Summer Meeting Collocated with the ASME 2012 Heat Transfer Summer Conference and the ASME 2012 10th Int. Conference on Nanochannels, Microchannels, and M, FEDSM 2
    Pages1-11
    Number of pages11
    DOIs
    StatePublished - 2012
    EventASME 2012 Fluids Engineering Division Summer Meeting, FEDSM 2012 Collocated with the ASME 2012 Heat Transfer Summer Conf. and the ASME 2012 10th International Conference on Nanochannels, Microchannels, and M, FEDSM 2012 - Rio Grande, Puerto Rico
    Duration: Jul 8 2012Jul 12 2012

    Publication series

    NameAmerican Society of Mechanical Engineers, Fluids Engineering Division (Publication) FEDSM
    Volume2
    ISSN (Print)0888-8116

    Other

    OtherASME 2012 Fluids Engineering Division Summer Meeting, FEDSM 2012 Collocated with the ASME 2012 Heat Transfer Summer Conf. and the ASME 2012 10th International Conference on Nanochannels, Microchannels, and M, FEDSM 2012
    Country/TerritoryPuerto Rico
    CityRio Grande
    Period7/8/127/12/12

    All Science Journal Classification (ASJC) codes

    • Mechanical Engineering

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