Results 171 to 180 of about 2,125 (211)
Some of the next articles are maybe not open access.
Bed forms in turbulent channel flow
Applied Mechanics Reviews, 2004Bed forms in channels result from the interaction between sediment transport, turbulence and gravitational settling. They document mechanisms of self-organization between flow structures and the developing structure of the bed. It is shown that these mechanisms can be characterized by length scales of the sediment, the bed form and the flow structure ...
Gyr and, Albert, Kinzelbach, Wolfgang
openaire +2 more sources
Three-dimensional river bed forms
Journal of Fluid Mechanics, 2012AbstractThe linear stability of a uniform flow in an infinitely wide erodible channel is investigated with respect to disturbances of the bed that are periodic in both the transverse and the longitudinal directions. A rotational flow and sediment transport model, originally developed to study the formation of two-dimensional dunes and antidunes, is ...
COLOMBINI, MARCO ENRICO +1 more
openaire +1 more source
Bed forms in alluvial channels
Journal of Fluid Mechanics, 1966A solution is offered for the relative phase relationship of bed, depth and surface waves observed in alluvial channels, and is found to be in good agreement with observation in laboratory flumes. The solution does not depend on an assumption of a phase lag between the velocity and sediment movement. The emphasis of the paper is on the mechanics of bed-
openaire +1 more source
Experimental Investigation of Form of Bed-Roughness
Journal of the Hydraulics Division, 1970Experimental observations regarding mean velocity distribution, angle of flow, static pressure distribution and longitudinal turbulence intensity are all made along a typical wooden wave in the domain of ripples and dunes of river flow. The wave was produced in a low-turbulence wind tunnel and the measurements were made by hot-wire anemometry in an air
openaire +1 more source
THE NATURE AND ORIGIN OF BED‐FORM HIERARCHIES
Sedimentology, 1968SUMMARYThe bed forms generated by liquid flows over loose‐grain boundaries assume only two orientations relative to flow, being either transverse or longitudinal, but range enormously in physical scale. Two types of bed form, current ripples and parting lineations, take a characteristic length (2) which is independent of boundary conditions as ...
openaire +1 more source
Bed form-induced hyporheic exchange and geochemical hotspots
Advances in Water Resources, 2021Corey Wallace +2 more
exaly
A method to evaluate length and height of bed forms in vegetated beds
2012In order to modelling the interaction among plants, flow field and sediment transport in vegetated rivers, some simplifications are often necessary. Accordingly, bed forms in vegetated rivers are often not considered, neither in the determination of resistance, nor in the definition of sediment entrainment.
Armanini, Aronne +2 more
openaire +1 more source