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Verfasst von:Voss, Björn Magnus [VerfasserIn]   i
 Stapf, Julian [VerfasserIn]   i
 Garbe, Christoph S. [VerfasserIn]   i
Titel:Bichromatic particle streak velocimetry bPSV
Titelzusatz:interfacial, volumetric three-component velocimetry using a single camera
Verf.angabe:Björn Voss, Julian Stapf, André Berthe, Christoph S. Garbe
E-Jahr:2012
Jahr:1 September 2012
Umfang:16 S.
Fussnoten:Gesehen am 19.07.2018
Titel Quelle:Enthalten in: Experiments in fluids
Ort Quelle:Berlin : Springer, 1983
Jahr Quelle:2012
Band/Heft Quelle:53(2012), 5, Seite 1405-1420
ISSN Quelle:1432-1114
Abstract:We propose a novel technique for three-dimensional three-component (3D3C) interfacial flow measurement. It is based on the particle streak velocimetry principle. A relatively long integration time of the camera is used for capturing the movement of tracer particles as streaks on the sensor. The velocity along these streaks is extracted by periodically changing the illumination using a known pattern. A dye with different absorption characteristics in two distinct wavelengths is used to color the fluid. The depth of particles relative to the fluid interface can then be computed from their intensities when illuminated with light sources at those two different wavelengths. Hence, from our approach, a bichromatic, periodical illumination together with an image processing routine for precisely extracting particle streak features is used for measuring 3D3C fluid flow with a single camera. The technique is applied to measuring turbulent Rayleigh-Bénard convection at the free air--water interface. Using Lagrangian statistics, we are able to demonstrate a clear transition from the Batchelor regime to the Richardson regime, both of which were postulated for isotropic turbulence. The relative error of the velocity extraction of our new technique was found to be below 0.5 %.
DOI:doi:10.1007/s00348-012-1355-8
URL:Bitte beachten Sie: Dies ist ein Bibliographieeintrag. Ein Volltextzugriff für Mitglieder der Universität besteht hier nur, falls für die entsprechende Zeitschrift/den entsprechenden Sammelband ein Abonnement besteht oder es sich um einen OpenAccess-Titel handelt.

Volltext ; Verlag: http://dx.doi.org/10.1007/s00348-012-1355-8
 Volltext: https://link.springer.com/article/10.1007/s00348-012-1355-8
 DOI: https://doi.org/10.1007/s00348-012-1355-8
Datenträger:Online-Ressource
Sprache:eng
K10plus-PPN:1577758080
Verknüpfungen:→ Zeitschrift

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