Magnetic drop-sheath wetting transition of a ferrofluid on a wire

J.-C. Bacri , C. Frenois , R. Perzynski , D. Salin

We study the spreading of a non wetting ferrofluid drop along a wire. The external control parameter of the magnetic fluid spreading is the magnetic field generated by the current in the conducting wire. For a current threshold we predict a spreading of the drop into a sheath coverage. This magnetic wetting transition is analogous to the wetting transition on a fiber predicted for totally wetting fluid in presence of Van der Waals forces.

Mots clés: magnetic fluids; wetting; drop sheath wetting; spreading; ferrofluid; external control parameter; magnetic fluid; conducting wire; sheath coverage; magnetic wetting transition; Van der Waals forces

Domaines: Articles anciens

J.-C. Bacri, C. Frenois, R. Perzynski, D. Salin. Magnetic drop-sheath wetting transition of a ferrofluid on a wire. Revue de Physique Appliquée, 1988, 23 (6), pp.1017-1022. ⟨10.1051/rphysap:019880023060101700⟩. ⟨jpa-00245902⟩