Results 51 to 60 of about 107,957 (205)

A Comparative Analysis of Logarithmic Law, Reynolds Stress, and Turbulence Kinetic Energy Methods for Bed Shear Stress Estimation in Complex Open‐Channel Flow

Water Resources Research
Numerous indirect methods for estimating the bed shear stress using velocity or turbulent stress profiles have been suggested in previous research. Although these methods have proven effective for simple boundary‐layer‐type flows, their efficacy in ...
Jeongsook Jeon, SeokKoo Kang
doaj   +1 more source

Is it appropriate to model turbidity currents with the three-equation model?

, 2015
The three-equation model (TEM) was developed in the 1980s to model turbidity currents (TCs) and has been widely used ever since. However, its physical justification was questioned because self-accelerating TCs simulated with the steady TEM seemed to ...
He, Zhiguo, Hu, Peng, Pähtz, Thomas
core   +1 more source

Numerical simulation of flow over a rough bed [PDF]

, 2004
This paper presents results of a direct numerical simulation (DNS) of turbulent flow over the rough bed of an open channel. We consider a hexagonal arrangement of spheres on the channel bed.
G. Salton, G.H. Silber, J.P. Callan, M.A.K. Halliday, M.F. Porter   +4 more
core   +8 more sources

Bed Shear Stress in Unsteady Open Channel Flow Over Rough Beds

Engineer: Journal of the Institution of Engineers, Sri Lanka, 2008
Very few studies have been carried out in the past in estimating bed shear stress in unsteady flows over rough channel beds. The shear velocity derived from de Saint Venant equations was compared with the steady state formulation using experimental data.
K. P. P. Pathirana, P. C. Ranasinghe, U. R. Ratnayake   +2 more
openaire   +2 more sources

On the modelling of biological effects on morphology in estuaries and seas [PDF]

, 2003
Morphological modelling aims to explain and predict the changes in rivers, seas and estuaries due to these interaction. In recent history, a lot of progress has been made, especially with stability analysis approaches.
Baptist, M.J., Holzhauer, H., Hulscher, S.J.M.H., Knaapen, M.A.F., Ledden, M. van, Vries, M.B. de   +5 more
core   +1 more source

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

Debris-bed friction during glacier sliding with ice–bed separation

Annals of Glaciology, 2019
Theory and experiments indicate that ice–bed separation during glacier slip over 2-D hard beds causes basal shear stress to reach a maximum at a particular slip velocity and decrease at higher velocities.
Neal R. Iverson, Christian Helanow, Lucas K. Zoet   +2 more
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

Flow Resistance Decomposition in the Presence of Leafy Flexible Vegetation and Sand Dunes

Water Resources Research
In open‐channel flows, hydraulic resistance is influenced by various factors, including sediment, channel geometry, and vegetation. Understanding how total resistance partitions into skin friction and form drag is fundamental for improving sediment ...
G. Artini, S. Francalanci, L. Solari, J. Aberle   +3 more
doaj   +1 more source

Estimation of bed shear stress and settling velocity with inertial dissipation method of suspended sediment concentration in cohesive sediment environments

Frontiers in Marine Science
In steady uniform boundary layers, the dynamics of sediment resuspension and transport are controlled by near-bed turbulence, often quantified by bed shear stress, τb.
Jongwi Chang, Guan-hong Lee, Ojudoo Darius Ajama, Wenjian Li   +3 more
doaj   +1 more source