Abstract
We follow the spreading of a magnetic liquid, a non wetting ferrofluid, along a wire. The external control parameter of the spreading length of the fluid is the magnetic field generated by a current travelling through the conducting wire. The spreading length results from a balance between capillary and magnetic forces. For a current threshold, we observe a rapid jump of this length corresponding to a sheath-like coverage of the wire. This magnetic wetting transition is analogous to the wetting transition on a fiber, predicted for a totally wetting fluid in the presence of van der Waals forces. The longer range of magnetic forces leads to a transition at a macroscopic scale. The crossover between micro and macro scales is studied. 1 associated with the Centre National de la Recherche Scientifique
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© 1990 Springer-Verlag
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Bacri, J.C., Perzynski, R., Salin, D. (1990). Magnetic wetting transition. In: De Coninck, J., Dunlop, F. (eds) Wetting Phenomena. Lecture Notes in Physics, vol 354. Springer, Berlin, Heidelberg. https://doi.org/10.1007/3-540-52338-3_1
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DOI: https://doi.org/10.1007/3-540-52338-3_1
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