SOME REMARKS ON THE BOUNDARY-CONDITIONS FOR MAGNETIC FLUIDS

Within the continum description for the flow dynamics of magnetic fluids, the equations of motion are found to involve, apart from the magnetic field, a fluid velocity v and a particle rotation rate (spin) omega. By employing the standard "no slip" and "no spin" boundary conditions, theoretical behavior predicted from these equations, in a certain boundary value problem, is found to be inconsistent with the experimental results. In the present note, by applying variant boundary conditions, both for velocity and spin, to the same boundary value problem, we show that an agreement, between the theoretical predictions and experimental observations, is possible.