A simple shear analysis of MR fluids

F. Jonsdottir*, K. H. Gudmundsson, E. Hreinsson, F. Thorsteinsson, O. Gutfleisch

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

The performance of most commercial MR fluid devices depends on the shear strength of the MR fluid. The field-induced yield stress can be accurately characterized experimentally by a magneto-rheometer. However, as a number of factors, for example, particle volume ratio and particle size, are known to affect the rheological properties of the fluid, such measurements can be very time consuming. Hence, computational models represent a valuable tool in the design of MR fluid devices. This study provides a computational model to quantitatively predict the shear yield stress for MR fluids. The configuration is a representative unit cell in the form of a cube of a visco-plastic material which contains a number of rigid spherical particles. The cube undergoes a simple shear deformation and the mean induced shear stress is calculated. The model is used to study the effect of particle size and volume ratio on the dynamic yield stress of MR fluids.

Original languageEnglish
Title of host publicationElectro-Rheological Fluids and Magneto-Rheological Suspensions - Proceedings of the 12th International Conference
PublisherWorld Scientific Publishing Co. Pte Ltd
Pages499-505
Number of pages7
ISBN (Print)9814340227, 9789814340229
DOIs
Publication statusPublished - 2011
Event12th International Conference on Electrorheological Fluids and Magnetorheological Suspensions, ERMR 2010 - Philadelphia, PA, United States
Duration: 16 Aug 201020 Aug 2010

Publication series

NameElectro-Rheological Fluids and Magneto-Rheological Suspensions - Proceedings of the 12th International Conference

Conference

Conference12th International Conference on Electrorheological Fluids and Magnetorheological Suspensions, ERMR 2010
Country/TerritoryUnited States
CityPhiladelphia, PA
Period16/08/1020/08/10

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