منابع مشابه
Toward modeling turbulent suspension of sand in the nearshore
[1] We present two depthand phase-resolving models, based on singleand two-phase approaches for suspended sediment transport under water waves. Both models are the extension of a wave hydrodynamic model Cornell Breaking Wave and Structure (COBRAS). In the two-phase approach, dilute two-phase mass and momentum equations are calculated along with a fluid turbulence closure based on balance equati...
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flow in natural river bends is a complex and turbulent phenomenon which affects the scour and sedimentations and causes an irregular bed topography on the bed. for the reason, the flow hydralics and the parameters which affect the flow to be studied and understand. in this study the effect of bed and wall roughness using the software fluent discussed in a sharp 90-degree flume bend with 40.3cm ...
Equivalent roughness of gravel-bed rivers
The relation between the equivalent roughness and different grain size percentiles of the sediment in gravel-bed rivers was determined under the hypothesis that the vertical distribution of the flow velocity follows a logarithmic law. A set of 954 data points was selected from rivers with gravel size sediment or larger, with a non-sinuous alignment and free of vegetation or obstacles. According...
متن کاملUnsteady Turbulence in Tidal Bores: Effects of Bed Roughness
A tidal bore is a wave propagating upstream as the tidal flow turns to rising. It forms during spring tide conditions when the flood tide is confined to a narrow funneled channel. To date, theoretical and numerical studies rely upon physical experiments to validate the developments, but the experimental data are limited mostly to visual observations and sometimes free-surface measurements. Here...
متن کاملEnhancing Surface Roughness of Castings When Sand-resin Mold Casting
T. Kovalyova, E. Eremin, S. Arinova, I. Medvedeva, A. Dostayeva, Karaganda State Technical University, Karaganda, Kazakhstan, Omsk State Technical University, Russia. In this connection, studies aimed at improving the obtaining process of high-quality castings of mining equipment are relevant. At the same time there is a need for studying physical and mechanical relationship of mixes in which a...
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ژورنال
عنوان ژورنال: Journal of Geophysical Research: Oceans
سال: 2003
ISSN: 0148-0227
DOI: 10.1029/2001jc001081