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Experiments in Fluids
Erschienen in: Experiments in Fluids 3/2005

01.09.2005 | Originals

Stereoscopic and velocimetric reconstructions of the free surface topography of antidune flows

verfasst von: D. Douxchamps, D. Devriendt, H. Capart, C. Craeye, B. Macq, Y. Zech

Erschienen in: Experiments in Fluids | Ausgabe 3/2005

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Abstract

Imaging methods developed to characterise the oscillatory free surface of rapid flows are presented and applied to torrential currents over sediment antidunes. The aim is to obtain high-resolution relief maps of the free surface topography. Two measurement principles are tested, both based on the imaging of floating tracers dispersed on the rapidly flowing surface. The first technique involves direct stereoscopic measurements. The second technique is indirect, and exploits a Bernoulli relation to derive surface elevations from the horizontal velocity field acquired using a single camera. Special attention is paid to error estimation and control. Relief maps
obtained for various bedform patterns are presented, allowing comparison between the two techniques.
Vorheriger Artikel Calibration of hot-wire probes using non-uniform mean velocity profiles
Nächster Artikel Transient and steady state behaviors of rapid granular shear flows

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Metadaten
Titel
Stereoscopic and velocimetric reconstructions of the free surface topography of antidune flows
verfasst von
D. Douxchamps
D. Devriendt
H. Capart
C. Craeye
B. Macq
Y. Zech
Publikationsdatum
01.09.2005
Erschienen in
Experiments in Fluids / Ausgabe 3/2005
Print ISSN: 0723-4864
Elektronische ISSN: 1432-1114
DOI
https://doi.org/10.1007/s00348-005-0983-7

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