Results 51 to 60 of about 363,183 (210)

Double-averaged velocity profiles over fixed dune shapes [PDF]

, 2008
Peer reviewedPublisher ...
Coleman, Stephen E., Mclean, Stephen R., Nikora, Vladimir I.   +2 more
core   +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

Influence of boulder array on the near-bed turbulent flow characteristics in a gravel bed stream - An experimental investigation

Journal of Hydrology and Hydromechanics, 2023
The present study aims to focus the turbulent flow characteristics over arrays of submerged boulders in a gravel bed stream. Round shaped boulders of diameter, Dc = 6 cm were staggered over a gravel bed stream (d50 = 4 cm) with varying boulder-to-boulder
Datta Akash, Das Ratul, Majumder Mrinmoy
doaj   +1 more source

Flow structure over square bars at intermediate submergence : Large Eddy Simulation study of bar spacing effect [PDF]

, 2008
Peer reviewedPublisher ...
Nikora, Vladimir I., Stoesser, Thorsten
core   +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

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

SPH modelling of depth-limited turbulent open channel flows over rough boundaries [PDF]

, 2017
A numerical model based on the Smoothed Particle Hydrodynamics (SPH) method is developed to simulate depth-limited turbulent open channel flows over hydraulically rough beds.
Arai, Aristodemo, Carney, Cebeci, Chang, Chang, Chang, Cheng, Chern, Christoph, Coleman, Coles, Cui, De Padova, Federico, Ferrand, Fu, Gingold, Gotoh, Gotoh, Gotoh, Gotoh, Hosseini, Kazemi, Khayyer, Khayyer, Khayyer, Leroy, Lind, Lopez, Mayrhofer, Mayrhofer, Monaghan, Monaghan, Nezu, Nicholas, Nikora, Rotta, Sahebari, Schmeeckle, Shao, Shao, Smagorinsky, Tan, Taylor, Tsuruta, Van Driest, Violeau, Wiberg, Zeng   +49 more
core   +1 more source

Experimental Investigation of Gravity Current Frontal Velocity on Rough Beds [PDF]

علوم و مهندسی آبیاری, 2012
The frontal of gravity current is most important section of theseflowtypes. The advance force in front is pressure gradient due to densitydifferences betweenfront flow andambient fluid.
M. Kaheh, M. Ghomeshi, S. H. Mousavi Jahromi   +2 more
doaj  

Periodic saltation over hydrodynamically rough beds: aeolian to aquatic [PDF]

Journal of Fluid Mechanics, 2015
We determine approximate analytical solutions for average periodic trajectories of particles that are accelerated by the turbulent shearing of a fluid between collisions with a hydrodynamically rough bed. We indicate how the viscosity of the fluid may influence the collisions with the bed.
BERZI, DIEGO, Jenkins, James T., Valance, Alexandre   +2 more
openaire   +4 more sources

Influence of bed roughness on near-bed turbulent flow characteristics

International Journal of Water Resources and Environmental Engineering, 2020
Influence of bed roughness on near-bed flow characteristics is of considerable importance, especially in turbulent flows over rough beds. This experimental study is devoted to insight various turbulent flow characteristics such as velocity distributions, Reynolds shear stresses (RSS) and velocity power spectra at the groove, lee and crest level of ...
Das Ratul, Nizar Sinan
openaire   +1 more source