Title: Self-assembly and novel planetary motion of ferrofluid drops in a rotational magnetic field
Authors: Chen, Ching-Yao
Hsueh, Hao-Chung
Wang, Sheng-Yan
Li, Yan-Hom
機械工程學系
Department of Mechanical Engineering
Issue Date: 1-May-2015
Abstract: We experimentally investigate the motion of a ferrodrop array in a rotating magnetic field. Magnetized and driven by the external field, the ferrodrops are stretched and self-aligned to form a drop array along the field orientation. An interesting planet-like dual rotation, including local self-spins of individual drops and a global revolution of the drop array, is newly identified. While the drops spin nearly synchronized with the external field, the revolution always lags behind the field and appears a forth and back movement. Prominence of the net revolutionary movement depends on the strength and uniformity of the overall field as well as the number of drops containing in the array. In general, more uniform and stronger rotating field leads to a more prominent global revolution. Phenomenon of such planetary motion can be applied to mix two fluids more effectively than self-spin drops.
URI: http://dx.doi.org/10.1007/s10404-014-1472-1
http://hdl.handle.net/11536/124657
ISSN: 1613-4982
DOI: 10.1007/s10404-014-1472-1
Journal: MICROFLUIDICS AND NANOFLUIDICS
Volume: 18
Issue: 5-6
Begin Page: 795
End Page: 806
Appears in Collections:Articles