Correlation algorithm for computing the velocity fields in microchannel flows with high resolution
M.N. Karchevskiy1,2, M.P. Tokarev1, A.A. Yagodnitsyna1,2, andВ L.A. Kozinkin1,2
1В Kutateladze Institute of Thermophysics SB RAS, Novosibirsk, Russia
2В Novosibirsk State University, Novosibirsk, Russia
E-mails: karchevskymi@gmail.com, mtokarev@itp.nsc.ru, yagodnitsinaaa@gmail.com, leon7archer@gmail.com
Keywords: Particle Image Velocimetry, Single Pixel Resolution, micro-PIV, velocity field, velocity fluctuations, micro-channel
Pages: 745–754
Abstract
A
cross-correlation algorithm, which enables the obtaining of the velocity field
in the flow with a spatial resolution up to a single pixel per vector, has been
realized in the work. It gives new information about the structure of
microflows as well as increases considerably
the accuracy of the measurement of the flow velocity field. In addition, the
realized algorithm renders information about the velocity fluctuations in the
flow structure. The algorithm was tested on synthetic data at a different
number of test images the velocity distribution on which was specified by the
Siemens star. The experimental validation
was done on the data provided within the international project “4th
International PIV Challenge”. Besides, a detailed comparison with the Particle
Image Velocimetry algorithm, which was realized previously, was carried out.
DOI: 10.1134/S0869864315060104
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