Title: Experiments on breakups of a magnetic fluid drop through a micro-orifice
Authors: Chen, Ching-Yao
Chen, C. -H.
Lee, W. -F.
機械工程學系
Department of Mechanical Engineering
Keywords: Ferrofluid;Drop breakup;Surface tension
Issue Date: 1-Oct-2009
Abstract: We experimentally study the breakups of a ferro fluid drop passing through an arrow passage under the attraction of an external field. After passing through the orifice, the fluid thread starts to neck down significantly and eventually breaks to form new droplets. The dynamics of the ferro fluid breakup are analyzed parametrically, including the diameter of the orifice and the local field strength. The patterns of fluid breakups can be characterized by two measurements of the breaking droplets, such as their sizes and stretching lengths. These two characteristic measurements mainly depend on the diameter of the orifice. Breaking droplets with less stretching and smaller sizes are resulted from a narrower orifice. On the other hand, the number of total breaking droplets that represents the transport effectiveness of ferro fluids significantly depends on both the diameter of the orifice and the local field strength. While a stronger field generates more breaking droplets, a maximum number of breaking droplets occurs at an intermediate orifice's diameter. (C) 2009 Elsevier B.V. All rights reserved.
URI: http://dx.doi.org/10.1016/j.jmmm.2009.06.066
http://hdl.handle.net/11536/6608
ISSN: 0304-8853
DOI: 10.1016/j.jmmm.2009.06.066
Journal: JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
Volume: 321
Issue: 20
Begin Page: 3520
End Page: 3525
Appears in Collections:Articles


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