Počet záznamů: 1
Drag reduction of dense fine-grained slurries
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SYSNO ASEP 0352181 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Drag reduction of dense fine-grained slurries Tvůrce(i) Vlasák, Pavel (UH-J) SAI, ORCID, RID
Chára, Zdeněk (UH-J) SAI, ORCID, RID
Štern, Petr (UH-J)Celkový počet autorů 3 Zdroj.dok. Journal of Hydrology and Hydromechanics. - : Ústav pro hydromechaniku AV ČR, v. v. i.. - : Ústav hydrológie SAV - ISSN 0042-790X
Roč. 58, č. 4 (2010), s. 261-270Poč.str. 10 s. Jazyk dok. eng - angličtina Země vyd. SK - Slovensko Klíč. slova kaolin slurry ; drag reduction ; experimental investigation ; peptization ; slurry rheology Vědní obor RIV BK - Mechanika tekutin CEP GAP105/10/1574 GA ČR - Grantová agentura ČR CEZ AV0Z20600510 - UH-J (2005-2011) UT WOS 000286574200005 DOI https://doi.org/10.2478/v10098-010-0024-y Anotace 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. Pracoviště Ústav pro hydrodynamiku Kontakt Soňa Hnilicová, hnilicova@ih.cas.cz, Tel.: 233 109 003 Rok sběru 2011
Počet záznamů: 1