par Hennenberg, Marcel ;Slavtchev, Slavtcho;Valchev, Galin
Référence Microgravity, science and technology, 22, 3, page (455-460)
Publication Publié, 2010
Article révisé par les pairs
Résumé : We consider an isothermal ferrofluid layer which is nearly inviscid and semi-infinite. It is subjected to a magnetic field that consists of two parts. The first one is a vertical constant component. The second part is oscillating with time in a vertical plane. The linearized Laplace law describing the deformation of the free surface reduces to the study of a Hill equation, thus generalizing the Mathieu equation studied for a purely oscillating magnetic field. Using a classical method, we derive the marginal oscillating conditions and compare them with experimental situations. © Springer Science+Business Media B.V. 2010.