About: Drag reduction of dense fine-grained slurries

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An Entity of Type : http://linked.opendata.cz/ontology/domain/vavai/Vysledek, within Data Space : linked.opendata.cz associated with source document(s)

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	Forces acting in the slurry among particles strongly affect the flow behaviour of highly concentrated fine-grained slurries. The attractive forces initiate a coagulation process, which gives rise to voluminous aggregates where a large amount of water is fixed. A modification of the physical-chemical environment of the slurry by addition of a peptizing agent results in destruction of the aggregates. Water originally fixed in the aggregates is liberated, the viscous friction can play a larger role in the slurry, which is liquefied. To prove these process three different kaolin-water mixtures were tested with an overpressure capillary viscometer, rotational viscometer, and experimental pipeline loop. The effect of two peptizing agents and their concentration was investigated. Even very low concentration of peptizing agent results in a significant reduction in the apparent viscosity and in the yield stress. Forces acting in the slurry among particles strongly affect the flow behaviour of highly concentrated fine-grained slurries. The attractive forces initiate a coagulation process, which gives rise to voluminous aggregates where a large amount of water is fixed. A modification of the physical-chemical environment of the slurry by addition of a peptizing agent results in destruction of the aggregates. Water originally fixed in the aggregates is liberated, the viscous friction can play a larger role in the slurry, which is liquefied. To prove these process three different kaolin-water mixtures were tested with an overpressure capillary viscometer, rotational viscometer, and experimental pipeline loop. The effect of two peptizing agents and their concentration was investigated. Even very low concentration of peptizing agent results in a significant reduction in the apparent viscosity and in the yield stress. (en)
Title	Drag reduction of dense fine-grained slurries Drag reduction of dense fine-grained slurries (en)
skos:prefLabel	Drag reduction of dense fine-grained slurries Drag reduction of dense fine-grained slurries (en)
skos:notation	RIV/67985874:_____/10:00352181!RIV11-GA0-67985874
http://linked.open...avai/riv/aktivita	P Z
http://linked.open...avai/riv/aktivity	P(GAP105/10/1574), Z(AV0Z20600510)
http://linked.open...iv/cisloPeriodika	4
http://linked.open...vai/riv/dodaniDat	2011
http://linked.open...aciTvurceVysledku	Vlasák, Pavel Chára, Zdeněk Štern, Petr
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	255201
http://linked.open...ai/riv/idVysledku	RIV/67985874:_____/10:00352181
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	kaolin slurry; drag reduction; experimental investigation; peptization; slurry rheology (en)
http://linked.open.../riv/klicoveSlovo	kaolin slurry peptization slurry rheology experimental investigation drag reduction
http://linked.open...odStatuVydavatele	SK - Slovenská republika
http://linked.open...ontrolniKodProRIV	[B07D64E5AD71]
http://linked.open...i/riv/nazevZdroje	Journal of Hydrology and Hydromechanics. Vodohospodársky časopis
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	Flow of concentrated and complex slurries in closed conduits
http://linked.open...UplatneniVysledku	2010
http://linked.open...v/svazekPeriodika	58
http://linked.open...iv/tvurceVysledku	Chára, Zdeněk Vlasák, Pavel Štern, Petr
http://linked.open...ain/vavai/riv/wos	000286574200005
http://linked.open...n/vavai/riv/zamer	Dynamics of Fluid Systems and Transformation Processes in Hydrosphere
issn	0042-790X
number of pages	10 (xsd:int)

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