Diverse Patterns Induced by Electric-Field in Ferrofluids
Abstract
Phase separation is induced by an electric field in a thin layer of ferrofluid. For dc field the pattern is labyrinthine. At low frequency, diverse patterns ranging from cellular, lattice, labyrinth, striation, to thumbprint are observed. The phase diagram for amplitude of the field versus frequency is determined. Using test particles we found that dissipation due to convective current is responsible for many of the observed structures. Thickness and concentration dependence are also studied.
- Publication:
-
APS March Meeting Abstracts
- Pub Date:
- March 2001
- Bibcode:
- 2001APS..MARC11001P