Results 91 to 100 of about 363,183 (210)
, 2005 We investigate the effective friction encountered by a mass sliding on a granular layer as a function of bed thickness and boundary roughness conditions. The observed friction has minima for a small number of layers before it increases and saturates to a
Arshad Kudrolli +3 more
core +1 more source
Evaluating the Hydraulic Performance of USBR II Stilling Basin with Rough Bed
Tikrit Journal of Engineering SciencesStilling basins are built in conjunction with dams, weirs, and gates to dissipate the high kinetic energy of incoming flow and prevent severe scouring of the downstream riverbed.
Layla A. M. Saleh, Saleh I. Khassaf
doaj +1 more source
Direct numerical simulation of the oscillatory flow around a sphere resting on a rough bottom
, 2017 The oscillatory flow around a spherical object lying on a rough bottom is investigated by means of direct numerical simulations of continuity and Navier-Stokes equations.
Blondeaux, Paolo +3 more
core +1 more source
Experimental study of granular surface flows via a fast camera: a continuous description [PDF]
, 2001 Depth averaged conservation equations are written for granular surface flows. Their application to the study of steady surface flows in a rotating drum allows to find experimentally the constitutive relations needed to close these equations from ...
Bouchaud J.-Ph +5 more
core +4 more sources
The Influence of Bed Roughness on Turbulence: Cabras Lagoon, Sardinia, Italy
Journal of Marine Science and Engineering, 2015 Estimates of bed roughness used for predictions of sediment transport are usually derived either from simple scalars of the physical roughness (i.e., ripple height or grain size) or from the hydrodynamic roughness length (Zo) based upon velocity gradient
Clémentine Chirol +5 more
doaj +1 more source
Lattice Boltzmann method used to simulate particle motion in a conduit
Journal of Hydrology and Hydromechanics, 2017 A three-dimensional numerical simulation of particle motion in a pipe with a rough bed is presented. The simulation based on the Lattice Boltzmann Method (LBM) employs the hybrid diffuse bounce-back approach to model moving boundaries.
Dolanský Jindřich +3 more
doaj +1 more source
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 +2 more
openaire +2 more sources
Erosion of a granular bed driven by laminar fluid flow
, 2008 Motivated by examples of erosive incision of channels in sand, we investigate the motion of individual grains in a granular bed driven by a laminar fluid to give us new insights into the relationship between hydrodynamic stress and surface granular flow.
ALEXANDER E. LOBKOVSKY +14 more
core +1 more source
Longitudinal Vortices in Granular Flows
, 2001 We present a new instability observed in rapid granular flows down rough inclined planes. For high inclinations and flow rates, the free surface of the flow experiences a regular deformation in the transverse direction.
Forterre, Yoel, Pouliquen, Olivier
core +4 more sources
One-dimensional velocity profiles in open-channel flow with intense transport of coarse sediment
EPJ Web of Conferences, 2015 The paper deals with laboratory experiments in open-channel flows with intense transport of model sediment (coarse plastic particles) in our new tilting flume. The major objectives of the paper are: 1. to discuss applied measuring methods, 2.
Zrostlík Štěpán +4 more
doaj +1 more source