About: Distribution of medium-to-coarse glass beads in slurry pipe flow: evaluation of measured concentration profiles

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	Concentration distribution of two fractions of glass-bead (ballotini) particles (medium size 0.44 mm, 0.53 mm respectively) in flows of heterogeneous slurry was measured in a laboratory pipe of the internal diameter of 100 mm using a radiometric device. Particles in such flows are supported by both interparticle contacts and turbulent eddies and the solids load must be considered as combined load composed of both contact-, and suspended load. Flows tend to be partially stratified and if high concentrated (mean volumetric concentration of solids higher than approximately 20 per cent) they exhibit a sliding bed. It appears that two most common methods to calculate concentration profiles in settling-slurry flows are not able to handle the sliding bed adequately. A comparison of the test results with the Gillies-Shook model for combined-load flows shows that the modeling approach requires further refinements. An application of the more recent Kaushal-Tomita model based on the turbulent-diffusion concept is inappropriate in high-concentrated slurries composed of medium-to-coarse grains. A simple 1-D model is proposed that takes conditions for an existence of a sliding bed into account and predicts a simplified concentration profile in stratified flows composed of a sliding bed and a transport layer above the bed. Concentration distribution of two fractions of glass-bead (ballotini) particles (medium size 0.44 mm, 0.53 mm respectively) in flows of heterogeneous slurry was measured in a laboratory pipe of the internal diameter of 100 mm using a radiometric device. Particles in such flows are supported by both interparticle contacts and turbulent eddies and the solids load must be considered as combined load composed of both contact-, and suspended load. Flows tend to be partially stratified and if high concentrated (mean volumetric concentration of solids higher than approximately 20 per cent) they exhibit a sliding bed. It appears that two most common methods to calculate concentration profiles in settling-slurry flows are not able to handle the sliding bed adequately. A comparison of the test results with the Gillies-Shook model for combined-load flows shows that the modeling approach requires further refinements. An application of the more recent Kaushal-Tomita model based on the turbulent-diffusion concept is inappropriate in high-concentrated slurries composed of medium-to-coarse grains. A simple 1-D model is proposed that takes conditions for an existence of a sliding bed into account and predicts a simplified concentration profile in stratified flows composed of a sliding bed and a transport layer above the bed. (en)
Title	Distribution of medium-to-coarse glass beads in slurry pipe flow: evaluation of measured concentration profiles Distribution of medium-to-coarse glass beads in slurry pipe flow: evaluation of measured concentration profiles (en)
skos:prefLabel	Distribution of medium-to-coarse glass beads in slurry pipe flow: evaluation of measured concentration profiles Distribution of medium-to-coarse glass beads in slurry pipe flow: evaluation of measured concentration profiles (en)
skos:notation	RIV/67985874:_____/14:00420876!RIV14-GA0-67985874
http://linked.open...avai/riv/aktivita	I P
http://linked.open...avai/riv/aktivity	I, P(GA103/09/0383)
http://linked.open...iv/cisloPeriodika	2
http://linked.open...vai/riv/dodaniDat	2014
http://linked.open...aciTvurceVysledku	Matoušek, Václav Krupička, Jan Pěník, Vojtěch
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Ústav pro hydrodynamiku AV ČR, v. v. i.
http://linked.open...dnocenehoVysledku	11853
http://linked.open...ai/riv/idVysledku	RIV/67985874:_____/14:00420876
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	concentration distribution; high concentrated slurry; pipeline flow; slurry flow experiment (en)
http://linked.open.../riv/klicoveSlovo	high concentrated slurry pipeline flow slurry flow experiment concentration distribution
http://linked.open...odStatuVydavatele	US - Spojené státy americké
http://linked.open...ontrolniKodProRIV	[0CDB3876B899]
http://linked.open...i/riv/nazevZdroje	Particulate Science and Technology
http://linked.open...in/vavai/riv/obor	BK
http://linked.open...ichTvurcuVysledku	3 (xsd:int)
http://linked.open...cetTvurcuVysledku	3 (xsd:int)
http://linked.open...vavai/riv/projekt	Internal structure of settling slurry flows
http://linked.open...UplatneniVysledku	2014
http://linked.open...v/svazekPeriodika	32
http://linked.open...iv/tvurceVysledku	Krupička, Jan Matoušek, Václav Pěník, Vojtěch
http://linked.open...ain/vavai/riv/wos	000329154100013
issn	0272-6351
number of pages	11 (xsd:int)
http://bibframe.org/vocab/doi	10.1080/02726351.2013.840706

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