Magnetic field induced flow pattern reversal in a ferrofluidic Taylor-Couette system.

ABSTRACT: We investigate the dynamics of ferrofluidic wavy vortex flows in the counter-rotating Taylor-Couette system, with a focus on wavy flows with a mixture of the dominant azimuthal modes. Without external magnetic field flows are stable and pro-grade with respect to the rotation of the inner cylinder. More complex behaviors can arise when an axial or a transverse magnetic field is applied. Depending on the direction and strength of the field, multi-stable wavy states and bifurcations can occur. We uncover the phenomenon of flow pattern reversal as the strength of the magnetic field is increased through a critical value. In between the regimes of pro-grade and retrograde flow rotations, standing waves with zero angular velocities can emerge. A striking finding is that, under a transverse magnet

SUBMITTER: Altmeyer S 

PROVIDER: S-EPMC4685649 | biostudies-literature | 2015 Dec

REPOSITORIES: biostudies-literature