"417636" . "4" . . . "RIV/68407700:21110/07:01141249!RIV08-MSM-21110___" . . "21110" . . "1"^^ . "P(1M0579)" . . "1"^^ . "bed shear stress; particle dispersion; sheet flow; suspension"@en . "RIV/68407700:21110/07:01141249" . "The paper analyzes the concentration-profile measurements in a medium-sand-slurry current above an erodible stationary bed in a 150-mm pipe. The experiments revealed interesting effects of high shear stress on the shapes of concentration profiles across the flow above the bed. The analysis suggests that carrier turbulence is a prevailing dispersion mechanism within the upper part of the discharge area above the bed for flow conditions characterized by values of the ratio u*b/vt higher than say 4.5. It seems that the shearing action as an exclusive particle dispersion mechanism is confined to the region not far above the top of the bed. Apparently, the high shear stress at the top of the stationary bed is capable of producing turbulent suspension that transports a considerable amount of medium-sand particles (average delivered volumetric concentrations of transported particles up to 0.26) through the 150-mm pipe."@en . . "55" . "Distribution of medium-sand particles in flow above erodible bed" . "Rozd\u011Blen\u00ED \u010D\u00E1stic st\u0159edn\u011Bzrnn\u00E9ho p\u00EDsku v proudu vody nad pohybliv\u00FDm dnem za podm\u00EDnek vysok\u00E9ho smykov\u00E9ho nap\u011Bt\u00ED ve dn\u011B"@cs . "Rozd\u011Blen\u00ED \u010D\u00E1stic st\u0159edn\u011Bzrnn\u00E9ho p\u00EDsku v proudu vody nad pohybliv\u00FDm dnem za podm\u00EDnek vysok\u00E9ho smykov\u00E9ho nap\u011Bt\u00ED ve dn\u011B"@cs . . "274;281" . "Distribution of medium-sand particles in flow above erodible bed" . "The paper analyzes the concentration-profile measurements in a medium-sand-slurry current above an erodible stationary bed in a 150-mm pipe. The experiments revealed interesting effects of high shear stress on the shapes of concentration profiles across the flow above the bed. The analysis suggests that carrier turbulence is a prevailing dispersion mechanism within the upper part of the discharge area above the bed for flow conditions characterized by values of the ratio u*b/vt higher than say 4.5. It seems that the shearing action as an exclusive particle dispersion mechanism is confined to the region not far above the top of the bed. Apparently, the high shear stress at the top of the stationary bed is capable of producing turbulent suspension that transports a considerable amount of medium-sand particles (average delivered volumetric concentrations of transported particles up to 0.26) through the 150-mm pipe." . "0042-790X" . "[D2D4E52DBCC5]" . "Distribution of medium-sand particles in flow above erodible bed"@en . "Journal of Hydrology and Hydromechanics" . . . "8"^^ . "P\u0159\u00EDsp\u011Bvek rozeb\u00EDr\u00E1 koncentra\u010Dn\u00ED profily m\u011B\u0159en\u00E9 v proudu p\u00EDskovodn\u00ED sm\u011Bsi nad p\u00EDskovou sedlinou v potrub\u00ED a analyzuje mo\u017En\u00E9 disperzn\u00ED mechanismy, je\u017E udr\u017Euj\u00ED p\u00EDskov\u00E9 \u010D\u00E1stice v proudu sm\u011Bsi. Anal\u00FDza vlastn\u00EDch m\u011B\u0159en\u00ED vedla ke zji\u0161t\u011Bn\u00ED, \u017Ee z\u0159ejm\u011B zdaleka ne v\u0161echny \u010D\u00E1stice v proudu nad sedlinou jsou udr\u017Eov\u00E1ny ve vznosu mezi\u010D\u00E1sticov\u00FDmi kolizemi, a to zejm\u00E9na p\u0159i proud\u011Bn\u00ED s vysok\u00FDm smykov\u00FDm nap\u011Bt\u00EDm ve dn\u011B, tj. za vysok\u00FDch hodnot Shieldsova \u010D\u00EDsla. Porovn\u00E1n\u00ED m\u011B\u0159en\u00FDch profil\u016F s teoretick\u00FDmi profily podle turbulentn\u011B disperzn\u00EDho modelu podpory \u010D\u00E1stic se zahrnut\u00EDm vlivu ru\u0161en\u00E9 sedimentace nazna\u010Dilo, \u017Ee v\u00FDznamn\u00E1 \u010D\u00E1st p\u0159epravovan\u00FDch \u010D\u00E1stic je v proudu udr\u017Eov\u00E1na turbulentn\u00EDmi v\u00EDry nosn\u00E9 kapaliny."@cs . . . . . "Matou\u0161ek, V\u00E1clav" . . . "SK - Slovensk\u00E1 republika" . "Distribution of medium-sand particles in flow above erodible bed"@en . .