Results 41 to 50 of about 22,970 (166)
KSCE Journal of Civil EngineeringThe aim of this study is assess the impact on the Chezy roughness coefficient (Cc), velocity distribution, energy dissipation and turbulent structures. The experiments were carried out in a rectangular flume at a bed slope of 2 % that compared the smooth
Hossein Sohrabzadeh Anzani +2 more
doaj +1 more source
Universal Velocity Distribution for Smooth and Rough Open Channel Flows
Journal of Applied Fluid Mechanics, 2013 The Prandtl second kind of secondary current occurs in any narrow channel flow causing velocity dip in the flow velocity distribution by introducing the anisotropic turbulence into the flow.
Jaan Hui Pu
doaj
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 +2 more
doaj
Depth-averaged velocity and bed shear stress in unsteady open channel flow over rough bed
E3S Web of Conferences, 2018 Very few studies have been carried out in the past in estimating depth-averaged velocity and bed shear stress in unsteady flow over rough beds. An experiment is thus conducted to investigate the vertical and lateral velocity profiles under unsteady flow ...
Khuntia Jnana Ranjan +3 more
doaj +1 more source
Bed Shear Stress and Near‐Bed Flow Through Sparse Arrays of Rigid Emergent Vegetation
Water Resources ResearchVegetation is an essential component of natural rivers and has significant effects on flow and morphodynamic processes. Although progress has been made in characterizing flow resistance in vegetated flows, the impact of vegetation on bed shear stress, a ...
J. Aliaga, J. Aberle
doaj +1 more source
Prediction of Relative Length of Hydraulic Jump Using Machine Learning Techniques in Rough Sloping Surfaces [PDF]
Journal of Applied Fluid MechanicsAccurate prediction of the relative length of a hydraulic jump (Lj/d1) is essential for the safe and economical design of energy dissipation structures in open channels.
P. Pathak, S. K. Gupta
doaj +1 more source
Erosion of fine sediments from a rough bed
E3S Web of Conferences, 2018 Gravel beds in river systems represent important aquatic habitats, which may be endangered by the introduction of large amounts of fine sediments. In order to better understand the interaction between fine sediments and coarse immobile beds in sediment ...
Trevisson Michele, Eiff Olivier
doaj +1 more source
Large and very large scale motions in roughbed open-channel flow
E3S Web of Conferences, 2018 Long duration PIV measurements in rough-bed (glass beads) open-channel flow (OCF) reveal that the pre-multiplied spectra of the streamwise velocity has a bimodal distribution due to the presence of large and very large scale motions (LSMs and VLSMs ...
Cameron Stuart +3 more
doaj +1 more source
Journal of Hydrology and HydromechanicsThe study aims to presents flow heterogeneity over rough permeable and impermeable gravel-bed stream. The rough permeable stream is prepared by laying multiple layers of gravel, whereas its impermeable counterpart is presented by a resin-casted gravel ...
Das Ratul, Ghosh Mithun
doaj +1 more source
Measurement of turbulent flow in a narrow open channel
Journal of Hydrology and Hydromechanics, 2016 The paper presents the experimental results of turbulent flow over hydraulically smooth and rough beds. Experiments were conducted in a rectangular flume under the aspect ratio b/h = 2 (b = width of the channel 0.5 m, and h = flow depth 0.25 m) for both ...
Sarkar Sankar
doaj +1 more source