Some aspects of heat and mass transfer in magnetic fluids

The present paper deals with the problem of investigating free convection concerning body flow of axial symmetry and showing the activity of gravitation and magnetic forces. The application of boundary layer approximation for solving the problem of thermomagnetic convection near horizontal cylinder has been discussed. Basing upon the solution of Stokes flow of magnetic sphere the analysis of mass transfer in magnetic suspension has been carried out to show the origin of thermophoresis under non-isothermal conditions. The direction of particle transfer depends on mutual orientation of the magnetic field and temperature gradient. Basing upon the experimental results of magnetophoresis in colloid solution of magnetite it was suggested to solve the problem of mass transfer for consideration of the kinetics of particle sedimentation on the walls. Magnetic field is known to influence transfer processes in biological suspensions. Magnetephoresis of lymphocytes in physiological solution has been displayed.