Drag reduction of dense fine-grained slurries

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985874%3A_____%2F10%3A00352181" target="_blank" >RIV/67985874:_____/10:00352181 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Drag reduction of dense fine-grained slurries

Popis výsledku v původním jazyce

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 isfixed. 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 theslurry, 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.

Název v anglickém jazyce

Drag reduction of dense fine-grained slurries

Popis výsledku anglicky

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 isfixed. 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 theslurry, 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.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

BK - Mechanika tekutin

OECD FORD obor

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Projekt

<a href="/cs/project/GAP105%2F10%2F1574" target="_blank" >GAP105/10/1574: Proudění zahuštěných a komplexních suspenzí v uzavřených profilech</a><br>

Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2010

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Journal of Hydrology and Hydromechanics. Vodohospodársky časopis

ISSN

0042-790X

e-ISSN

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Svazek periodika

58

Číslo periodika v rámci svazku

4

Stát vydavatele periodika

SK - Slovenská republika

Počet stran výsledku

10

Strana od-do

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Kód UT WoS článku

000286574200005

EID výsledku v databázi Scopus

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