000014837 001__ 14837
000014837 005__ 20161115100203.0
000014837 04107 $$aeng
000014837 046__ $$k2016-08-21
000014837 100__ $$aVolk, Romain
000014837 24500 $$aA shadow PTV technique for particle tracking in an inhomogeneous turbulent flow (INVITED)

000014837 24630 $$n24.$$p24th International Congress of Theoretical and Applied Mechanics - Book of Papers
000014837 260__ $$bInternational Union of Theoretical and Applied Mechanics, 2016
000014837 506__ $$arestricted
000014837 520__ $$2eng$$aWe use a Shadow Particle Tracking Velocimetry technique (S-PTV) with collimated light to investigate the dynamics of a turbulent von K´arm´an (VK) flow of water. Such a PTV technique, easy to calibrate as apparent particle position on the images do not depend on the camera-particle distance, allows to track small objects (100 µm particles, fibers, ...) with low power LEDs as light sources. Investigating the dynamics of Lagrangian tracers, we observe the flow produced in a square tank is bistable, the two states having a life time of several minutes so that the high speed recordings appear as snapshots of one of the two states that can be reconstructed from the particle trajectories. We show the two states topologies strongly differ from the one of the mean flow, and how the bistability affects the dispersion of tracers.

000014837 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000014837 653__ $$a

000014837 7112_ $$a24th International Congress of Theoretical and Applied Mechanics$$cMontreal (CA)$$d2016-08-21 / 2016-08-26$$gICTAM2016
000014837 720__ $$aVolk, Romain
000014837 8560_ $$ffischerc@itam.cas.cz
000014837 8564_ $$s165604$$uhttps://invenio.itam.cas.cz/record/14837/files/TS.FS03-2.01.pdf$$yOriginal version of the author's contribution as presented on CD,  page 3138, code TS.FS03-2.01
.
000014837 962__ $$r13812
000014837 980__ $$aPAPER