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Erschienen in: Experiments in Fluids 2/2008

01.02.2008 | Research Article

Variational second order flow estimation for PIV sequences

verfasst von: L. Alvarez, C. A. Castaño, M. García, K. Krissian, L. Mazorra, A. Salgado, J. Sánchez

Erschienen in: Experiments in Fluids | Ausgabe 2/2008

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Abstract

We present in this paper a variational approach to accurately estimate simultaneously the velocity field and its derivatives directly from PIV image sequences. Our method differs from other techniques that have been presented in the literature in the fact that the energy minimization used to estimate the particles motion depends on a second order Taylor development of the flow. In this way, we are not only able to compute the motion vector field, but we also obtain an accurate estimation of their derivatives. Hence, we avoid the use of numerical schemes to compute the derivatives from the estimated flow that usually yield to numerical amplification of the inherent uncertainty on the estimated flow. The performance of our approach is illustrated with the estimation of the motion vector field and the vorticity on both synthetic and real PIV datasets.

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Metadaten
Titel
Variational second order flow estimation for PIV sequences
verfasst von
L. Alvarez
C. A. Castaño
M. García
K. Krissian
L. Mazorra
A. Salgado
J. Sánchez
Publikationsdatum
01.02.2008
Verlag
Springer-Verlag
Erschienen in
Experiments in Fluids / Ausgabe 2/2008
Print ISSN: 0723-4864
Elektronische ISSN: 1432-1114
DOI
https://doi.org/10.1007/s00348-007-0402-3

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