Dynamics of a magnetic fluid droplet in a rotating field
J.C.
Bacri, A. Cebers, S. Lacis, R. Perzynski
Abstract
The response of a
magnetic fluid microdrop to a rotating magnetic field is studied numerically in
2D by the boundary element method (BEM). On increasing field frequency, the
motion of the droplet goes through a transition from a state where the droplet
follows the magnetic field with a constant phase lag to a state where the phase
lag increases in a series of kinks when the field frequency passes the critical
one. The equations of the droplet motion are derived analytically and good
agreement with the BEM is obtained.