Abstract
We have investigated the behaviour of a free surface of a suspension of ferrimagnetic particles in heptane under strongly reduced gravity. It was found that the free surface is destabilised when a homogeneous magnetic field parallel to the surface is applied. We show that the destabilisation of the fluid layer is forced by the influence of the suspension on the homogeneity of the magnetic field producing a magnetic field component normal to the fluid surface. Furtheron it is shown that the strength of the critical magnetic field parallel to the surface varies with the volume concentration of magnetic particles in the suspension. The experiments were carried out at the drop tower “Bremen” of the Center of Applied Space Technology and Microgravity (ZARM) in Bremen.
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