On rheophysics of high-concentrated suspensions / Bashkirtseva I. A.,Zubarev A. Yu.,Iskakova L. Yu.,Ryashko L. B. // COLLOID JOURNAL. - 2009. - V. 71, l. 4. - P. 446-454.

ISSN/EISSN:

1061-933X / 1608-3067

Type:

Article

Abstract:

Experiments with high-concentrated suspensions of solid particles show that that their viscosity increases by several times or even orders of magnitude, when the shear rate in the suspensions exceeds some critical value, which depends on the concentration and shape of particles and the physicochemical composition of carrier liquids. It is experimentally found that, within a certain range of shear rates, which is also predetermined by the composition of the suspensions, a steady flow becomes unstable, and regular or random oscillations arise in the flow with a period of several seconds. A theory is proposed for these phenomena, which is based on the fact that the increase in the viscosity with the shear rate is explained by the contact friction between particles, while the flow oscillations arise when the differential viscosity of a suspension acquires negative values.

Author keywords:

COLLOIDAL SUSPENSIONS; SPHERICAL-PARTICLES; BULK STRESS; SHEAR; VISCOSITY; SPHERES; BEHAVIOR; TESTS

DOI:

10.1134/S1061933X09040024

Web of Science ID:

ISI:000269185400002

Соавторы в МНС:

Другие поля

Поле	Значение
Month	AUG
Publisher	MAIK NAUKA/INTERPERIODICA/SPRINGER
Address	233 SPRING ST, NEW YORK, NY 10013-1578 USA
Language	English
EISSN	1608-3067
Keywords-Plus	COLLOIDAL SUSPENSIONS; SPHERICAL-PARTICLES; BULK STRESS; SHEAR; VISCOSITY; SPHERES; BEHAVIOR; TESTS
Research-Areas	Chemistry
Web-of-Science-Categories	Chemistry, Physical
ResearcherID-Numbers	Zubarev, Adrey/B-4752-2014
Funding-Acknowledgement	Russian Foundation for Basic Research {[}07-02-00079, 07-01-96076-Ural, 07-01-96079-Ural, EM RF 2.1.1/2571, 2.1.1/1535]; CRDF {[}RG07-005-02]
Funding-Text	This work was supported by the Russian Foundation for Basic Research, project nos. 07-02-00079, 07-01-96076-Ural, 07-01-96079-Ural, grants EM RF 2.1.1/2571, 2.1.1/1535, and the grant CRDF RG07-005-02.
Number-of-Cited-References	29
Usage-Count-Since-2013	6
Journal-ISO	Colloid J.
Doc-Delivery-Number	486GX