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RESEARCH PRODUCT

Labyrinthine instability of miscible magnetic fluids

M. IgoninM. IgoninAndrejs CebersAndrejs Cebers

subject

Materials scienceDominant wavelengthFlow (psychology)Stability diagramMechanicsCondensed Matter PhysicsInstabilityElectronic Optical and Magnetic MaterialsPhysics::Fluid DynamicsNormal fieldWavelengthHele-Shaw flowClassical mechanicsLinear stability analysis

description

Abstract We consider an inhomogeneous magnetic fluid (MF), modeling a miscible MF pair, in a Hele–Shaw cell under a normal field. A linear stability analysis for the sharp straight interface (analytically) and for the diffused one (numerically) is performed. For the former case, the neutral curves and the stability diagram are found along with the critical wavelength and parameter values. Oscillatory or monotonous instabilities are shown to occur. For the diffused interface, we recognize the importance of 2D flow viscous effects along with the conventional wall friction and observe that in strong fields the dominant wavelength scales as the cell gap.

yearjournalcountryeditionlanguage
2002-11-01Journal of Magnetism and Magnetic Materials
https://doi.org/10.1016/s0304-8853(02)00632-7