000003934 001__ 3934
000003934 005__ 20141118153341.0
000003934 04107 $$acze
000003934 046__ $$k2009-05-11
000003934 100__ $$aLukerchenko, N.
000003934 24500 $$aTransition from the saltation mode of bed load transport to the rolling mode

000003934 24630 $$n15.$$pEngineering Mechanics 2009
000003934 260__ $$bInstitute of Theoretical and Applied Mechanics AS CR, v.v.i., Prague
000003934 506__ $$arestricted
000003934 520__ $$2eng$$aThe paper deals with the sediment transport of sand particles conveyed by water in an open channel. A 3D numerical model developed by the authors was used for simulation of the sand particles movement in the channel with rough bed. Similarly to Shields theory of sediment transport incipient motion of the bed load particles the shear stress for the transition process from saltation mode to rolling mode can be defined. The shear stress value can be determined as a function of two dimensionless parameters, particle parameter and equivalent bed roughness. The particle parameter is a function of the particle size and density, and the carrier liquid density and viscosity. The presented numerical solution reveals that the shear stress for the transition process from saltation mode to rolling mode is less than the shear stress for the incipient sediment motion and depends on channel bed roughness.

000003934 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000003934 653__ $$a

000003934 7112_ $$aEngineering Mechanics 2009$$cSvratka (CZ)$$d2009-05-11 / 2009-05-14$$gEM2009
000003934 720__ $$aLukerchenko, N.$$iVlasák, P.$$iChára, Z.$$iIvanova, I.
000003934 8560_ $$ffischerc@itam.cas.cz
000003934 8564_ $$s420648$$uhttps://invenio.itam.cas.cz/record/3934/files/Ivanova-223-PT.pdf$$y
             Original version of the author's contribution as presented on CD, 223.
            
000003934 962__ $$r3852
000003934 980__ $$aPAPER