Analysis of liquid sloshing of a tuned magnetic fluid damper for single and co-axial cylindrical containers

A tuned magnetic fluid damper (TMFD) is a dynamic absorber using a magnetic fluid. A characteristic of the TMFD is changing natural frequency of a magnetic fluid sloshing under a magnetic field. The magnetic fluid sloshing in a coaxial cylindrical container was analyzed theoretically under the axisymmetrical magnetic field. The theoretical results showed that a radial component of the magnetic field also changed the natural sloshing frequency. A policy of the suitable design of the TMFD was presented and the effect of the radial component of the magnetic field was verified experimentally.

Research Highlights► An iron core increases a range of natural sloshing frequency of a magnetic fluid. ► An optimal length of the iron core is indicated by the fluid free surface.