Publisher : The Korean Society of Mechanical Engineers
DOI : 10.22634/KSME-B.19220.127.116.119
Title & Authors
A linear analysis of interfacial instabilities of ferrofluids Park, Chang-Ho; Ju, Sang-U; Lee, Sang-Chun;
Surface motion of a magnetic fluid is studied by a linear stability analysis. When a thin horizontal magnetic-fluid layer is placed on a nonmagnetic substrate, with a vertical magnetic field applied, the surface of the ferrofluid layer can be severely corrugated, due to the normal-field instability. Based on conservation laws, it is shown that the normal-field instability of thin ferrofluid layers is a long-wave instability and that it is analogous to the interfacial mode of the thermocapillary instability in a thin horizontal layer heated from below.