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dc.contributor.authorKARGULEWICZ, Mickaël
dc.contributor.authorMARRERO, Victor
dc.contributor.authorTICHY, John
dc.contributor.author
 hal.structure.identifier
IORDANOFF, Ivan
164351 Institut de Mécanique et d'Ingénierie de Bordeaux [I2M]
dc.date.accessioned2014
dc.date.available2016
dc.date.issued2012
dc.date.submitted2014
dc.identifier.issn0742-4787
dc.identifier.urihttp://hdl.handle.net/10985/8258
dc.description.abstractMagnetorheological (MR) fluids are fluids whose properties vary in response to an applied magnetic field. Such fluids are typically composed of microscopic iron particles ( 1 20 lm diameter, 20 40% by volume) suspended in a carrier fluid such as mineral oil or water. MR fluids are increasingly proposed for use in various mechanical system applications, many of which fall in the domain of tribology, such as smart dampers and clutches, prosthetic articulations, and controllable polishing fluids. The goal of this study is to present an overview of the topic to the tribology audience, and to develop an MR fluid model from the microscopic point of view using the discrete element method (DEM), with a long range objective to better optimize and understand MR fluid behavior in such tribological applications. As in most DEM studies, inter-particle forces are determined by a force-displacement law and trajectories are calculated using Newton’s second law. In this study, particle magnetization and magnetic interactions between particles have been added to the discrete element code. The global behavior of the MR fluid can be analyzed by examining the time evolution of the ensemble of particles. Microscopically, the known behavior is observed: particles align themselves with the external magnetic field. Macroscopically, averaging over a number of particles and a significant time interval, effective viscosity increases significantly when an external magnetic field is applied. These preliminary results would appear to establish that the DEM is a promising method to study MR fluids at the microscopic and macroscopic scales as an aid to tribological design. [DOI: 10.1115/1.4006021]
dc.language.isoen
dc.publisherAmerican Society of Mechanical Engineers
dc.rightsPost-print
dc.subjectmagnetism
dc.subjectlubrication
dc.subjecthydrodynamic
dc.subjectrheology
dc.subjectnon-Newtonian
dc.titleModeling of Magnetorheological Fluids by the Discrete Element Method
ensam.embargo.terms2 Years
dc.identifier.doi10.1115/1.4006021
dc.typdocArticle dans une revue sans comité de lecture
dc.localisationCentre de Bordeaux-Talence
dc.subject.halPhysique: Dynamique des Fluides
dc.subject.halMathématique: Analyse numérique
ensam.page031706-031706
ensam.journalJournal of Tribology
ensam.volume134
hal.statusunsent


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