Taylor-Couette flow stability: effect of vertical density stratification and azimuthal magnetic fields

Details Taylor-Couette flow stability: effect of vertical density stratification and azimuthal magnetic fields Taylor-Couette flow stability: effect of vertical density stratification and azimuthal magnetic fields

Nov 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004aipc..733..165s&link_type=abstract

MHD COUETTE FLOWS: Experiments and Models. AIP Conference Proceedings, Volume 733, pp. 165-176 (2004).

Physics

Flow Instabilities, Laminar Flows, Stratified Flows

Scientific paper

Also vertical density stratification and/or azimuthal magnetic fields essentially change the stability properties of the Taylor-Couette flow. Our results confirm the conclusion of Molemaker, McWilliams & Yavneh that vertically stratified Taylor-Couette flows are unstable against nonaxisymmetric disturbances if the angular velocity decreases with radius but not the angular momentum. Moreover, azimuthal magnetic fields can destabilize MHD Taylor-Couette flows with arbitrary rotation law for appropriate magnetic field geometry and amplitude. Such experiments in the laboratory might be much-promising cases due to the independence of the stability properties on the (very small) magnetic Prandtl number.

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