ON THE EFFECT OF WALL SLIP ON THE DETERMINATION OF THE YIELD STRESS OF MAGNETORHEOLOGICAL FLUIDS / Caballero-Hernandez Jaime,Gomez-Ramirez Ana,Duran Juan D. G.,Gonzalez-Caballero F.,Zubarev Andrey Yu.,Lopez-Lopez Modesto T. // APPLIED RHEOLOGY. - 2017. - V. 27, l. 1.

ISSN/EISSN:

1430-6395 / 1617-8106

Type:

Article

Abstract:

We study the effect of wall slip on the measured values of the yield stress of magnetorheological (MR) fluids. For this aim we used a rheometer provided with parallel-plate geometries of two types, distinguished by having smooth or rough surfaces. We found that wall slip led to the underestimation of the yield stress when measuring geometries with smooth surfaces were used, and that this underestimation was more pronounced for the static than for the dynamic yield stress. Furthermore, we analysed the effect that both irreversible particle aggregation due to colloidal interactions and reversible magnetic fieldinduced particle aggregation had on the underestimation provoked by wall slip. We found that the higher the degree of aggregation the stronger the underestimation of the yield stress. At low intensity of the applied magnetic field irreversible particle aggregation was dominant and, thus, the underestimation of the yield stress was almost negligible for well-dispersed MR fluids, whereas it was rather pronounced for MR fluids suffering from irreversible aggregation. As the magnetic field was increased the underestimation of the yield stress became significant even for the best dispersed MR fluid.

Author keywords:

Magnetorheological fluid; particulate suspension; yield stress; wall slip; magnetorheology; rheometry ELECTRORHEOLOGICAL FLUIDS; IONIC LIQUIDS; SUSPENSIONS; PARTICLES; SHEAR; RHEOMETRY; BEHAVIOR; FLOW

DOI:

10.3933/ApplRheol-27-15001

Web of Science ID:

ISI:000397196700004

Соавторы в МНС:

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Другие поля

Поле	Значение
Publisher	KERSCHENSTEINER VERLAG GMBH
Address	MORIKESTR 4, LAPPERSDORF, 93138, GERMANY
Language	English
Article-Number	15001
EISSN	1617-8106
Keywords-Plus	ELECTRORHEOLOGICAL FLUIDS; IONIC LIQUIDS; SUSPENSIONS; PARTICLES; SHEAR; RHEOMETRY; BEHAVIOR; FLOW
Research-Areas	Mechanics
Web-of-Science-Categories	Mechanics
Author-Email	modesto@ugr.es
ResearcherID-Numbers	Lopez-Lopez, Modesto T/K-7327-2012
ORCID-Numbers	Lopez-Lopez, Modesto T/0000-0002-9068-7795 Gomez-Ramirez, Ana Maria/0000-0003-4402-7515
Funding-Acknowledgement	Plan Nacional de Investigacion Cientifica, Desarrollo e Innovacion Tecnologica, Ministerio de Economia y Competitividad, Spain - ERDF, European Union {[}FIS2013-41821-R]; Russian Fund of Fundamental Investigation {[}16-58-12003]; Program of Ministry of Science and Education of the Russian Federation {[}3.1438.2017/PCh]
Funding-Text	This study was supported by Plan Nacional de Investigacion Cientifica, Desarrollo e Innovacion Tecnologica, Ministerio de Economia y Competitividad, Spain co-funded by ERDF, European Union (project FIS2013-41821-R), by the Russian Fund of Fundamental Investigation (project 16-58-12003), and by Program of Ministry of Science and Education of the Russian Federation (project 3.1438.2017/PCh).
Number-of-Cited-References	42
Usage-Count-Last-180-days	2
Usage-Count-Since-2013	2
Journal-ISO	Appl. Rheol.
Doc-Delivery-Number	EP2EU