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RESEARCH ARTICLE Y. D. Afanasyev E. K. Demirov

Y. D. Afanasyev E. K. Demirov
A variational filtration and interpolation technique for PIV employing fluid
dynamical constraints
Received: 28 February 2005 / Revised: 8 June 2005 / Accepted: 17 June 2005
Springer-Verlag 2005
Abstract A variational method for post-processing of the
velocity fields obtained by particle image velocimetry
(PIV) is described. This method allows one to effectively
reconstruct the flow field in the areas of the domain
where the spurious vectors were discarded either by
other filters or manually. If the spurious vectors cannot
be removed, they are smoothed in with the surrounding
field so that their effect is significantly reduced. The
method is based on the application of dynamical con-
straints such as continuity, smoothness and matching to
the original data. The results of the application of the
developed algorithm to the velocity fields obtained by
PIV in laboratory experiments with quasi-two-dimen-
sional vortex dipoles are discussed.


Source: Afanassiev, Iakov - Department of Physics and Physical Oceanography, Memorial University of Newfoundland


Collections: Geosciences