Results 71 to 80 of about 18,690 (210)

A PIV-based method to measure spatial gradients in bedload transport over a dune

open access: yesE3S Web of Conferences, 2018
Traditional sediment transport equations calculate sediment flux from bed shear stress and the equations predict that transport increases nonlinearly with an increase in flow velocity.
Terwisscha van Scheltinga Renske C.   +2 more
doaj   +1 more source

Optical Tracking Velocimetry (OTV): Leveraging Optical Flow and Trajectory-Based Filtering for Surface Streamflow Observations

open access: yesRemote Sensing, 2018
Nonintrusive image-based methods have the potential to advance hydrological streamflow observations by providing spatially distributed data at high temporal resolution.
Flavia Tauro   +5 more
doaj   +1 more source

A novel permanent gauge-cam station for surface-flow observations on the Tiber River [PDF]

open access: yesGeoscientific Instrumentation, Methods and Data Systems, 2016
Flow monitoring of riverine environments is crucial for hydrology and hydraulic engineering practice. Besides few experimental implementations, flow gauging relies on local water level and surface-flow velocity measurements through ultrasonic meters and ...
F. Tauro   +7 more
doaj   +1 more source

Aligning Real‐Time Recurrence Computational Fluid Dynamics Simulations with Plant Data for the Ruhrstahl–Heraeus Degassing Process of Steel

open access: yessteel research international, EarlyView.
Uncertainties exist in computational fluid dynamics (CFD) modeling of complex metallurgical processes, even when partly validated by laboratory experiments. rCFD enables computationally efficient prediction of long‐term RH degassing and can be adapted to vary flow conditions.
Xiaomeng Zhang   +3 more
wiley   +1 more source

Phase Separation Technique for Suspended Particles in Microchannel Utilizing Bilayered Acoustic Fields

open access: yesJournal of Fluid Science and Technology, 2009
A non-intrusive and continuous separation technique for suspended particles in a microchannel has been developed by utilizing acoustic radiation force with two ultrasonic transducers.
Mitsuhisa ICHIYANAGI   +3 more
doaj   +1 more source

Optically-Trapped Particle Tracking Velocimetry

open access: yes
In this paper, we propose a microflow velocimetry based on particle tracking with the aid of the optical trapping of tracers, namely, optically-trapped particle tracking velocimetry (ot-PTV). The ot-PTV has two phases: a trap phase, in which individual tracers are trapped by an optical force and held at a measurement position; a release phase, in which
Tsuji, Tetsuro   +2 more
openaire   +2 more sources

Quantifying the Impact of Temporal and Spatial Heterogeneity in Turbulence on Bed‐Load Transport Over Vegetated Beds Under Wave‐Current Conditions

open access: yesGeophysical Research Letters, Volume 53, Issue 7, 16 April 2026.
Abstract Laboratory experiments measured velocity and bedload transport in vegetated channels under current‐dominated, combined wave‐current conditions. Waves and vegetation, respectively, introduced temporal and spatial heterogeneity in the velocity, which significantly impacted sediment transport rate.
Bingrun Liu, Wei Li, Heidi M. Nepf
wiley   +1 more source

Experimental evidence of chaotic advection in a convective flow

open access: yes, 1999
Lagrangian chaos is experimentally investigated in a convective flow by means of Particle Tracking Velocimetry. The Fnite Size Lyapunov Exponent analysis is applied to quantify dispersion properties at different scales.
Aurell E.   +9 more
core   +1 more source

Global Hydroclimatic Controls on Multithread River Dynamics

open access: yesAGU Advances, Volume 7, Issue 2, April 2026.
Abstract Most large rivers in densely populated areas split flow into multiple channels, forming interconnected pathways called threads. Multithread rivers are sensitive to hydroclimatic changes, yet understanding their dynamics is challenging due to the lack of robust metrics to characterize their evolution.
Feifei Zhao   +7 more
wiley   +1 more source

Evaluation of Guiding Device for Downstream Fish Migration with in-Field Particle Tracking Velocimetry and CFD

open access: yesJournal of Applied Fluid Mechanics, 2015
The performance of a fish guiding device located just upstream a hydropower plant is scrutinized. The device is designed to redirect surface orientated down-stream migrating fish (smolts) away from the turbines towards a spillway that act as a relatively
Staffan Lundstrom   +4 more
doaj  

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