caa a22 4500 606196951 CHVBK 20210128100927.0 cr unu---uuuuu 210128e20150101xx s 000 0 eng 10.1007/s00348-014-1874-6 doi (NATIONALLICENCE)springer-10.1007/s00348-014-1874-6 Optical flow for incompressible turbulence motion estimation [Elektronische Daten] [Xu Chen, Pascal Zillé, Liang Shao, Thomas Corpetti] We propose in this paper a new formulation of optical flow dedicated to 2D incompressible turbulent flows. It consists in minimizing an objective function constituted by an observation term and a regularization one. The observation term is based on the transport equation of the passive scalar field. For non-fully resolved scalar images, we propose to use the mixed model in large eddy simulation to determine the interaction between large scales and unresolved ones. The regularization term is based on the continuity equation of 2D incompressible flows. Compared to prototypical method, this regularizer preserves more vortex structures by eliminating constraints over the vorticity field. The evaluation of the proposed formulation is done over synthetic and experimental images, and the improvements in term of estimation are discussed. Springer-Verlag Berlin Heidelberg, 2014 Chen Xu Laboratoire de Mécanique des Fluides et d'Acoustique, Lyon, France aut Zillé Pascal Laboratoire de Mécanique des Fluides et d'Acoustique, Lyon, France aut Shao Liang Laboratoire de Mécanique des Fluides et d'Acoustique, Lyon, France aut Corpetti Thomas Laboratoire COSTEL UMR 6554 LETG, Rennes, France aut Experiments in Fluids Springer Berlin Heidelberg 56/1(2015-01-01), 1-14 0723-4864 56:1<1 2015 56 348 https://doi.org/10.1007/s00348-014-1874-6 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s00348-014-1874-6 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Chen Xu Laboratoire de Mécanique des Fluides et d'Acoustique, Lyon, France aut NATIONALLICENCE 700 1- Zillé Pascal Laboratoire de Mécanique des Fluides et d'Acoustique, Lyon, France aut NATIONALLICENCE 700 1- Shao Liang Laboratoire de Mécanique des Fluides et d'Acoustique, Lyon, France aut NATIONALLICENCE 700 1- Corpetti Thomas Laboratoire COSTEL UMR 6554 LETG, Rennes, France aut NATIONALLICENCE 773 0- Experiments in Fluids Springer Berlin Heidelberg 56/1(2015-01-01), 1-14 0723-4864 56:1<1 2015 56 348