Results 101 to 110 of about 363,183 (210)

A model for the erosion onset of a granular bed sheared by a viscous fluid

, 2015
We study theoretically the erosion threshold of a granular bed forced by a viscous fluid. We first introduce a novel model of interacting particles driven on a rough substrate.
Barizien, Antoine, Wyart, Matthieu, Yan, Le   +2 more
core   +1 more source

Effect of bed roughness on the mixing layers in a 90° asymmetrical confluence [PDF]

, 2015
In this paper, the mixing layer between the two incoming flows in a 90 degree, asymmetrical open channel confluence is investigated. Specific attention is given towards looking into the effect of bed roughness on the flow patterns in the confluence. This
Creëlle, Stéphan, De Mulder, Tom, Schindfessel, Laurent   +2 more
core  

Quantifying Bed Surface Roughness in Bedrock and Boulder‐Bed Rivers

Journal of Geophysical Research: Earth Surface
AbstractThe surface roughness of river beds affects flow resistance and sediment transport. In rough‐bed rivers (RBRs), where flow is shallow relative to roughness height, the surface roughness is difficult to define due to complex multi‐scale roughness elements (bedrock, boulders, and sediment patches).
Houseago, R. C., Hodge, R. A., Asher, B., Ferguson, R. I., Hackney, C. R., Hardy, R. J., Hoey, T. B., Johnson, J. P. L., Rice, S. P., Yager, E. M., Yamasaki, T.   +10 more
openaire   +2 more sources

Surfaces of coastal biogenic structures: exploiting advanced digital design and fabrication strategies for the manufacturing of oyster reef and mussel bed surrogates

Frontiers in Marine Science
Coastal biogenic structures, formed by ecosystem engineering species, often feature rough surfaces characterized by intricate topographies and highly three-dimensional reliefs.
Jan Hitzegrad, Leon Brohmann, Friedrich Herding, Kai Pfennings, Sven Jonischkies, Elisa Scharnbeck, Jeldrik Mainka, Inka Mai, Inka Mai, Christian Windt, Harald Kloft, Achim Wehrmann, Dirk Lowke, Dirk Lowke, Nils Goseberg, Nils Goseberg   +15 more
doaj   +1 more source

Measurements of Mass Transport Over a Rough Bed

Coastal Engineering 1984, 1984
Measurements have been made with a laser doppler anemometer of the time-mean velocity of the fluid close to the bed in a wave flume. Both a rough bed, consisting of gravel of median diameter 11 mm, and a smooth bed were investigated. With the rough bed the time-mean velocity at a given height was found to be strongly dependent on position relative to ...
openaire   +2 more sources

Multi-scale model for heat and mass transfer during rice drying [PDF]

, 2013
Grain drying is a simultaneous heat and moisture transfer problem. The modeling of such a problem is of significance in understanding and controlling the drying process.
ElGamal, Ramadan, Pieters, Jan, Ronsse, Frederik   +2 more
core   +1 more source

Force and torque acting on particles in a transitionally rough open channel flow

, 2011
Direct numerical simulation of open channel flow over a geometrically rough wall has been performed at a bulk Reynolds number of approximately 2900. The wall consisted of a layer of spheres in a square arrangement. Two cases have been considered.
Bayazit, Clemens Chan-Braun, Detert, Manuel García-Villalba, Markus Uhlmann, Nezu, Nikuradse, Pokrajac, Schlichting, Shields, Townsend, Uhlmann, Uhlmann, van Rijn   +13 more
core   +1 more source

Bed roughness under partial transport conditions

, 2007
Reliable roughness models are of great importance, for example when predicting water levels in rivers. However, classical roughness models, based on fully mobile sediment beds, are not adequate for conditions in which only part of the bed is mobile (partial transport).
Spekkers, Matthieu, Tuijnder, Arjan, Ribberink, Jan Sjoerd, Janssen, Catarine   +3 more
openaire   +1 more source

Influence of particle density on turbulence characteristics over a rough surface

Journal of Engineering and Applied Science
The objective of the study is to use a 3D Acoustic Doppler Velocimeter (ADV) to gauge the typical flow and turbulence characteristics within a non-uniform open channel.
Kirti Singh, Kesheo Prasad
doaj   +1 more source

Impact of bed roughness and submergence on velocity profiles and flow structures in hydraulic jumps. [PDF]

Sci Rep
Agrawal N, Padhi E, Larrarte F, Singhal GD.   +3 more
europepmc   +1 more source