Calibration of turbidity meter and acoustic doppler velocimetry (Triton-ADV) for sediment types present in drained peatland headwaters: Focus on particulate organic peat

2009 ◽  
Vol 26 (8) ◽  
pp. 1019-1035 ◽  
Author(s):  
Hannu Marttila ◽  
Heini Postila ◽  
Bjørn Kløve
Keyword(s):  
Doppler Velocimetry ◽  
Sediment Types ◽  
Acoustic Doppler Velocimetry

Experimental Study of the Type VI Stilling Basin Performance

2015 ◽  
Vol 137 (3) ◽  
Author(s):  
Seyed Sobhan Aleyasin ◽  
Nima Fathi ◽  
Peter Vorobieff
Keyword(s):  
Experimental Study ◽  
Kinetic Energy ◽  
River Flow ◽  
Doppler Velocimetry ◽  
Huge Amount ◽  
Stilling Basin ◽  
Stilling Basins ◽  
Turbulence Data ◽  
Flow Turbulence ◽  
Acoustic Doppler Velocimetry

Understanding the estuarine turbulent flow from dams, channels, and pipes, as well as the river flow are very important due to the potential to cause damage to the bed of the river or channel and cause scouring of structures such as the saddles of bridges, because of the huge amount of the kinetic energy carried by the flow. One of the most efficient yet simple ways to dissipate this energy is to install a stilling basin at the discharge point to calm the flow. Turbulence data were recorded using acoustic Doppler velocimetry (ADV) for type VI2 of stilling basins for pipe outlets. During the study, various splitters and a cellular baffle were placed in the stilling basin, and the baffle locations were changed to assess the effect on the energy dissipation. Velocity at several locations in the basin was measured for different Froude numbers to investigate the effect of flow rate. Based on the findings of the experiments, several suggestions regarding the efficiency and geometry of stilling basins were made.

scholarly journals Influence of floodplain and riparian vegetation in the conveyance and structure of turbulent flow in compound channels

2018 ◽  
Vol 40 ◽  
pp. 06035 ◽  
Author(s):  
João N. Fernandes ◽  
João B. Leal ◽  
António H. Cardoso
Keyword(s):  
Turbulent Flow ◽  
Riparian Vegetation ◽  
Main Channel ◽  
Submerged Vegetation ◽  
Doppler Velocimetry ◽  
Compound Channels ◽  
Turbulence Structures ◽  
Experimental Campaign ◽  
Turbulent Flow Structure ◽  
Acoustic Doppler Velocimetry

The present study aims at understanding the changes in the channel conveyance and in the turbulent flow structure due to the presence of both submerged vegetation in the floodplains and riparian vegetation. An experimental campaign was carried out comprising uniform compound channels flows (i) without any kind of vegetation, (ii) with synthetic grass in the floodplains, (iii) with synthetic grass in the floodplains and rods in the interface between main channel and the floodplain and (iv) with synthetic grass in the floodplains and artificial shrubs in the interface between main channel and the floodplain. For comparison, the water depth in all flow cases was kept constant. Accurate acoustic Doppler velocimetry was used to evaluate the 3d velocity field and the turbulence structures characteristics.

Acoustic Doppler velocimetry in aquaculture research: Raceway and quiescent zone hydrodynamics

2006 ◽  
Vol 34 (1) ◽  
pp. 16-25 ◽  
Author(s):  
Roger C. Viadero ◽  
Andrea Rumberg ◽  
Donald D. Gray ◽  
Aislinn E. Tierney ◽  
Kenneth J. Semmens
Keyword(s):  
Doppler Velocimetry ◽  
Acoustic Doppler Velocimetry

Phononic crystal surface mode coupling and its use in acoustic Doppler velocimetry

Ultrasonics ◽  
2016 ◽  
Vol 65 ◽  
pp. 78-86 ◽  
Author(s):  
Ahmet Cicek ◽  
Aysevil Salman ◽  
Olgun Adem Kaya ◽  
Bulent Ulug
Keyword(s):  
Mode Coupling ◽  
Crystal Surface ◽  
Phononic Crystal ◽  
Surface Mode ◽  
Doppler Velocimetry ◽  
Acoustic Doppler Velocimetry
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