Yield stress in thin layers of ferrofluids / Zubarev AY,Iskakova LY // PHYSICA A-STATISTICAL MECHANICS AND ITS APPLICATIONS. - 2006. - V. 365, l. 2. - P. 265-281.

ISSN/EISSN:

0378-4371 / нет данных

Type:

Article

Abstract:

We present results of theoretical study of quasielastic behavior of ferrofluid filling a thin flat gap, placed into perpendicular magnetic field. When the field exceeds a certain critical magnitude, magnetic particles form dense discrete domains, elongated along the field, and linking the gap boundaries. Due to these bridges between the gap boundaries, the ferrofluid exhibits quasielastic properties with respect to shear strain in the plane of the gap. We estimated the elastic modules as well as the yield stress of the system, depending on magnetic field and concentration of magnetic particles in the ferrofluid. Analysis shows that there are at least two microscopical mechanisms of transition from the elastic to fluid behavior of the ferrofluid. The first one is connected with the loss of the mechanical equilibrium of the domains, slopped, under the shear stress, with respect to applied magnetic field. The second mechanism is connected with breakup of the ``bridge{''} into two separate drops, when the shear strain exceeds some critical magnitude. Estimates show that for real ferrofluids the second mechanism is more probable. (c) 2005 Elsevier B.V. All rights reserved.

Author keywords:

ferrofluids; heterogeneous aggregates; phase transitions DIPOLAR HARD-SPHERES; FLUIDS; LIQUID; FIELD

DOI:

10.1016/j.physa.2005.09.071

Web of Science ID:

ISI:000237687900001

Соавторы в МНС:

Другие поля

Поле	Значение
Month	JUN 15
Publisher	ELSEVIER SCIENCE BV
Address	PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
Language	English
Keywords-Plus	DIPOLAR HARD-SPHERES; FLUIDS; LIQUID; FIELD
Research-Areas	Physics
Web-of-Science-Categories	Physics, Multidisciplinary
Author-Email	andrey.zubarev@usu.ru
ResearcherID-Numbers	Zubarev, Adrey/B-4752-2014
Number-of-Cited-References	20
Usage-Count-Since-2013	5
Journal-ISO	Physica A
Doc-Delivery-Number	044QS