0000000001142135

AUTHOR

S. Cutillas

showing 2 related works from this author

Experimental and Theoretical Study of the Field Induced Phase Separation in Electro- and Magnetorheological Suspensions

1999

We present here the study of field induced phase separation in E.R. and M.R. fluids. Two thermodynamic models — one for the formation of chais of particles and the other for phase separation are presented and compared with experimental results obtained with two kinds of suspensions. One was made of silica particles in silicone oil and the other was made of magnetic polystyrene particles in water. In the presence of a flow the phase separation occurs with the dense phase forming a regular pattern of stripes. The dependence of the period of these stripes on the intensity of the magnetic field is well reproduced by the same kind of thermodynamic model if we add the effect of normal stresses i…

Materials scienceField (physics)business.industryStatistical and Nonlinear PhysicsCondensed Matter PhysicsSilicone oilMagnetic fieldchemistry.chemical_compoundOpticschemistryChemical physicsPhase (matter)Magnetorheological fluidPolystyrenebusinessShear flowIntensity (heat transfer)International Journal of Modern Physics B
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Flow-induced structures in magnetorheological suspensions

1999

We have measured the yield stress of a magnetic suspension as a function of the external field. To explain the existence of this yield stress, we report a comparison between two models, one based on isolated chains of particles and the other taking into account that the structure is formed by aggregates of particles.

Shear modulusShear rateClassical mechanicsMaterials scienceRheologyField (physics)Critical resolved shear stressMagnetorheological fluidElectromagnetic suspensionComposite materialCondensed Matter PhysicsShear flowElectronic Optical and Magnetic MaterialsJournal of Magnetism and Magnetic Materials
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