Tuning the resonant frequencies of a drop by a magnetic field

Autor:	Jamin, Timothée, Djama, Yacine, Bacri, Jean-Claude, Falcon, Eric
Rok vydání:	2016
Předmět:	Physics - Fluid Dynamics Physics - Classical Physics
Druh dokumentu:	Working Paper
Popis:	We report an experimental study of a magnetic liquid drop deposited on a superhydrophobic substrate and subjected to vertical vibrations in presence of a static magnetic field. It is well-known that a flattened drop of usual liquid displays oscillating lobes at its periphery when vibrated. By adding ferromagnetic nanoparticles to a water drop and varying the strength of the magnetic field, we are experimentally able to efficiently tune the resonant frequencies of the drop. By using conservation energy arguments, we show that the magnetic field contribution is equivalent to adding an effective negative surface tension to the drop. Our model is found in good agreement with the experiments with no fitting parameter. Comment: Physical Review Fluids, American Physical Society, 2016
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1604.07686 Zobrazit plný text záznamu View this record from Arxiv