Stress relaxation in a ferrofluid with clustered nanoparticles / Borin Dmitry Yu,Zubarev Andrey Yu,Chirikov Dmitry N.,Odenbach Stefan // JOURNAL OF PHYSICS-CONDENSED MATTER. - 2014. - V. 26, l. 40.

ISSN/EISSN:

0953-8984 / 1361-648X

Type:

Article

Abstract:

The formation of structures in a ferrofluid by an applied magnetic field causes various changes in the rheological behaviour of the ferrofluid. A ferrofluid based on clustered iron nanoparticles was investigated. We experimentally and theoretically consider stress relaxation in the ferrofluid under the influence of a magnetic field, when the flow is suddenly interrupted. It is shown that the residual stress observed in the fluid after the relaxation is correlated with the measured and theoretically predicted magnetic field-induced yield stress. Furthermore, we have shown that the total macroscopic stress in the ferrofluid after the flow is interrupted is defined by the presence of both linear chains and dense, drop-like bulk aggregates. The proposed theoretical approach is consistent with the experimentally observed behaviour, despite a number of simplifications which have been made in the formulation of the model. Thus, the obtained results contribute a lot to the understanding of the complex, magnetic field-induced rheological properties of magnetic colloids near the yield stress point.

Author keywords:

ferrofluid; rheology; relaxation TELECHELIC POLYMER NETWORKS; DYNAMICAL PROPERTIES; YIELD-STRESS; RHEOLOGY; FLUIDS; MODELS

DOI:

10.1088/0953-8984/26/40/406002

Web of Science ID:

ISI:000343423400012

Соавторы в МНС:

Другие поля

Поле	Значение
Month	OCT 8
Publisher	IOP PUBLISHING LTD
Address	TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
Language	English
Article-Number	406002
EISSN	1361-648X
Keywords-Plus	TELECHELIC POLYMER NETWORKS; DYNAMICAL PROPERTIES; YIELD-STRESS; RHEOLOGY; FLUIDS; MODELS
Research-Areas	Physics
Web-of-Science-Categories	Physics, Condensed Matter
Author-Email	Dmitry.Borin@tu-dresden.de
ResearcherID-Numbers	Borin, Dmitry/D-4652-2009 Odenbach, Stefan/D-4542-2009
ORCID-Numbers	Borin, Dmitry/0000-0003-3842-1487
Funding-Acknowledgement	RFBR {[}12-01-00132, 13-02-91052, 13-01-96047, 14-08-00283]; Government of the Russian Federation {[}02.A03.21.0006]
Funding-Text	The work at Ural Federal University was carried out within a development programme for the financial support of young scientists. A Z and D Ch would like to acknowledge the support of RFBR, grants 12-01-00132, 13-02-91052, 13-01-96047, 14-08-00283 and Act 211 Government of the Russian Federation No. 02.A03.21.0006.
Number-of-Cited-References	30
Usage-Count-Last-180-days	3
Usage-Count-Since-2013	21
Journal-ISO	J. Phys.-Condes. Matter
Doc-Delivery-Number	AR2ND