Abstract
The problem of mixing miscible fluids is relevant for submillimeter-sized channels, in which the Reynolds numbers are small and the diffusion front on the contact line of two fluids is stable. In the present paper, a diffusion front is numerically simulated at the interface of two miscible fluids, one of which is magnetic fluid. It is shown that the instability of the diffusion front in a uniform magnetic field normal to it leads to rapid mixing of fluids. The most rapid mixing occurs if the magnetic field rotates. It was found that there is an optimal frequency of rotation at which mixing occurs most rapidly. This frequency depends on the mixing time.
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