Results 201 to 210 of about 79,589 (237)

Geometric bed roughness and the bed state storm cycle

Journal of Geophysical Research, 2011
[1] Temporal variation in the geometric roughness of the mobile sandy seabed during wave forcing events is investigated as a function of bed state. The bed states include irregular ripples, cross ripples, linear transition ripples, and flat bed, each appearing repeatedly within a different range of wave energies, as part of the bed state storm cycle ...
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Roughness in Fixed-Bed Streams

2017
The solid boundaries of a natural watercourse are usually composed of earth, sediments, and vegetation of different species, which together determine the resistance to the flow of water. From a hydraulic point of view, these parameters are treated as equivalent roughness.
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Turbulent oscillatory flow over rough beds

Journal of Fluid Mechanics, 1987
Velocity measurements are presented for turbulent oscillatory flow over rough beds. Two components of velocity were measured with a laser-Doppler anemometer and the rough beds consisted of a single layer of sand, gravel or pebbles on a flat surface. Turbulence intensities showed significant variation during the course of the cycle.
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Bed roughness adjustments determined from fractal measurements of river-bed morphology

Journal of Hydrodynamics, 2018
The flow resistance in rivers is an old and partly unsolved problem. In this study, the bed surface fractal dimension (BSFD) is used to describe the bed morphology, and combined with the bed roughness, a general model experiment is developed. The results show that there is a positive relationship between the BSFD and the bed roughness, which can be ...
Yin-jun Zhou, Jin-you Lu, Li Chen, Jie Ren   +3 more
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Roughness of stable, armored gravel beds

Water Resources Research, 1993
The grain roughness of stable armored beds that formed in a laboratory flume under a range of steady flow conditions on rounded, flat and angular gravel is analyzed. Gravel roughness geometry is determined from bed surface profiles and vertical photographs. These techniques have been employed in field situations.
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On sea bed roughness variability

2003
Taormina ...
FARACI C, FOTI, Enrico, MALARKEY J, DAVIES A. G.   +3 more
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On sea bed roughness variability in presence of a rippled bed

2003
Barcelona ...
FARACI C, MALARKEY J, FOTI, Enrico, DAVIES A. G.   +3 more
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Experimental and numerical investigation of the origin of surface roughness in laser powder bed fused overhang regions

Virtual and Physical Prototyping, 2021
Shaochuan Feng, Amar M Kamat, Soheil Sabooni   +2 more
exaly  

Effect of processing parameters on overhanging surface roughness during laser powder bed fusion of AlSi10Mg

Journal of Manufacturing Processes, 2021
Tao Yang, Tingting Liu, Huiliang Wei
exaly  

Dependence of saltation parameters on bed roughness and bed porosity

2012
In numerical models of bed load transport a bed structure of channel could be described by two parameters, a size of bed particles and a standard deviation of normal distribution of bed particles in the vertical direction. The present paper deals with the effect of bed parameters on average length and height of one jump of saltating particle.
Kharlamova, I. (Irina), Vlasák, P. (Pavel)   +1 more
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