Influence of magnetic fields on taylor vortex formation in magnetic fluids | Zendy

Mariusz Niklas | Zendy

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Influence of magnetic fields on taylor vortex formation in magnetic fluids

Author(s) -

Mariusz Niklas

Publication year - 1987

Publication title -

zeitschrift für physik b condensed matter

Language(s) - English

Resource type - Journals

eISSN - 1431-584X

pISSN - 0722-3277

DOI - 10.1007/bf01471080

Subject(s) - taylor–couette flow , physics , magnetic field , taylor number , vortex , instability , couette flow , mechanics , classical mechanics , amplitude , condensed matter physics , flow (mathematics) , optics , quantum mechanics

The flow of a magnetic fluid placed inside a small gap between concentric rotating cylinders is investigated for axial, radial and azimuthal magnetic fields. An equation of motion is derived phenomenologically to describe the hydrodynamics of magnetic fluids. Studied are the changes in the critical Taylor numberTcand wave numberTcwhich characterize the instability of primary circular Couette flow towards Taylor vortices. It is found that all above magnetic fields have a stabilizing effect on circular Couette flow and thatTcincreases or decreases, depending on the direction of the magnetic field. Besides this, the influence of the magnetic fields on the correlation length ?0, the wave number of maximal growthkmand the linear growth rate amplitude s0 is determined.

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