Results 31 to 40 of about 22,970 (166)

DEVELOPMENT AND EVALUATION OF A NATURAL CONVECTION SOLAR DRYER [PDF]

Journal of Soil Sciences and Agricultural Engineering, 2003
A simple solar dryer has been developed and tested for drying high moisture rough rice at the experimental farm of Rice Mechanizati n Center (R.M.C). Meet EI-Oyba. Kafr EI-Sheikh Governorate.
M. EI-Kholy,
doaj   +1 more source

Experiments on two-phase flow in hydraulic jump on pebbled rough bed: Part 1–Turbulence properties and particle chord time and length

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, Carlo Gualtieri, Hubert Chanson   +2 more
doaj   +1 more source

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
openaire   +2 more sources

Forms of Bed Roughness in Alluvial Channels [PDF]

Journal of the Hydraulics Division, 1961
Laboratory experiments in a large recirculating flume, in addition to field studies, have established that resistance to flow and sediment transport in alluvial channels are related to the form of ...
D. B. Simons, E. V. Richardson
openaire   +1 more source

Influence of Right Triangular Prism Rough Beds on Hydraulic Jumps

Applied Sciences
A hydraulic jump phenomenon is exciting in turbulent flow as it causes large-scale turbulence and high-energy loss. This paper investigates the hydraulic jump characteristics of right triangular prism rough beds.
Cong Ty Trinh, Jianmin Zhang, Cong Trieu Tran   +2 more
doaj   +1 more source

Hydrodynamic investigation of fluvial sediment transport with Soil Protrusion Apparatus (SPA)

Open Engineering, 2014
In order to understand sediment transport process based on knowledge of their soil properties and hydrodynamic behaviour a series of 2D laboratory controlled small-scale experiments were conducted using the Ahlborn sediment mobile bed tank (4.0×0.6×0.2 m)
Jayaratne Ravindra, Salim Sarik
doaj   +1 more source

Numerical and analysis effects of rectangular prism rough beds on hydraulic jumps in open channels

AIP Advances
Hydraulic jumps are characterized by intense turbulence and substantial energy dissipation in open channel flows or stilling basins. This study utilizes the Flow-3D hydraulic computational model, integrating the renormalization group k-ε turbulence model
Cong Ty Trinh, Cong Trieu Tran
doaj   +1 more source

A Numerical Approach to Analyzing Shallow Flows over Rough Surfaces

Fluids
The hydraulic characteristics (such as velocity profiles, near-bed velocity profile, bed shear stress, and resistance coefficients) of shallow flows over rough surfaces were investigated using numerical simulations.
M. Nasimul Chowdhury, Abdul A. Khan, Oscar Castro-Orgaz   +2 more
doaj   +1 more source

This study has for objective to study the theoretical relation of the hydraulic jump by sill, evolving in an U-shaped channel, with a rough bed. Functional relations, in non-dimensional form, relating the jump characteristics, seeming the effect of the be

Journal of Fundamental and Applied Sciences, 2015
This study has for objective to study the theoretical relation of the hydraulic jump by sill, evolving in an U-shaped channel, with a rough bed. Functional relations, in non-dimensional form, relating the jump characteristics, seeming the effect of the ...
A. Ghomri, M. Debabeche, F. Riguet
doaj   +1 more source

Reducing Darcy coefficient by using drag reduction methods in open-channel flows: Effect on discharge capacity and potential application to mitigate river flooding impact

E3S Web of Conferences, 2018
Drag reduction by polymer addition is a common strategy used to minimize friction losses in pipe flows but has not been tested in river flows. Present paper then aims at measuring backwater curves and velocity profiles within smooth and rough bed flume ...
Mignot Emmanuel, Riviere Nicolas, Lefevre Arnaud, Quillien Bernard   +3 more
doaj   +1 more source