The interaction of a vortex ring with a sloped sediment layer: critical criteria for incipient grain motion [PDF]
, 2012 Experiments were performed to analyse the interaction between a vortex ring and a sloped sediment layer. Attention focussed on interactions under “critical” conditions, in which sediment motion was only just induced by the ring's flow field.
Munro, Richard J.
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Sand bed roughness in the nearshore [PDF]
Journal of Geophysical Research: Oceans, 2003 Measurements made using sonar altimeters mounted on an amphibious surveying vehicle are analyzed for root‐mean‐square (RMS) bedform roughness. Observations for 22 days over a 500 m × 700 m area are used to quantify the cross‐shore distribution of roughness and its variability. Large bedforms (with amplitudes 5–50 cm) occur frequently in shallow water (&
Edith L. Gallagher +2 more
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Experimental Study of Effect of Rough Bed on Sequent Depth Ratio of Hydraulic Jump on Adverse Slope [PDF]
علوم و مهندسی آبیاری, 2012 Hydraulic jump is one of the important phenomena in rapidly varied flow. Due to this phenomenon the energy loss, the upstream flow velocity significantly decreases.
Parastoo Parsamehr +1 more
doaj
Alluvial cover on bedrock channels: applicability of existing models [PDF]
Earth Surface Dynamics, 2020 Several studies have demonstrated the importance of alluvial cover; furthermore, several mathematical models have also been introduced to predict the alluvial cover on bedrock channels.
J. Mishra, T. Inoue
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Effects of Airflow Reversal in Fixed Bed Drying of Rough Rice on HRY and Drying Performance. [PDF]
, 2013 Conventional (single-direction airflow) fixed-bed drying of rough rice results in reduced grain quality from over-drying of grain in the bottom layers of the dryer.
A. Talib, Rosnita +4 more
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Oscillatory Laminar Flow above a Rough Bed
Coastal Engineering 1978, 1978 Measurements are reported of the velocity distribution in the laminar boundary layer above a rough bed oscillating in its own plane in still air. The measurements were made with a hot-wire anemometer and the beds consisted of spheres packed closely together on flat plates.
C.B. George, J.F.A. Sleath
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Saltation of particles in turbulent channel flow. [PDF]
, 2014 This paper numerically investigates particle saltation in a turbulent channel flow having a rough bed consisting of two to three layers of densely packed spheres.
Avital, E +4 more
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Water Science and Engineering, 2023 This study reported and discussed turbulence characteristics, such as turbulence intensity, correlation time scales, and advective length scales. The characteristic air–water time scale, including the particle chord time and length and their probability ...
Farhad Bahmanpouri +2 more
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3D numerical simulation of a lab-scale pressurized dense fluidized bed focussing on the effect of the particle-particle restitution coefficient and particle–wall boundary conditions [PDF]
, 2016 3D numerical simulations of dense pressurized fluidized bed are presented. The numerical prediction of the mean vertical solid velocity are compared with experimental data obtained from Positron Emission Particle Tracking.
Fede, Pascal +2 more
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Laboratory investigation of the effect of hysteresis phenomenon of supercritical flow on the rough bed on the relative residual energy parameter [PDF]
Journal of Hydraulic StructuresIn the present study, the hysteretic behavior of supercritical flow that can occur in a channel near additional structures, such as changes in the bed of the channel, has been investigated experimentally and analytically.
Ehsan Aminvash +3 more
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