Viscous fingering in a magnetic fluid. I. Radial Hele-Shaw flow
作者:
C. Flament,
G. Pacitto,
J.-C. Bacri,
I. Drikis,
A. Cebers,
期刊:
Physics of Fluids
(AIP Available online 1998)
卷期:
Volume 10,
issue 10
页码: 2464-2472
ISSN:1070-6631
年代: 1998
DOI:10.1063/1.869765
出版商: AIP
数据来源: AIP
摘要:
Viscous fingering phenomena in a circular geometry are studied for a magnetic fluid submitted to a perpendicular magnetic field. Air is injected at the center of a Hele-Shaw cell filled with a viscous magnetic fluid. The instability of the interface between the air and the magnetic fluid is favored by the presence of a magnetic field. More precisely, the threshold of the instability is magnetic field dependent. The patterns obtained for high values of the magnetic field with a low injection rate are similar to those obtained in the absence of an external field and at high flow rates. We also give a linear analysis for the stability of radial flow under the influence of a magnetic field. This calculation provides us with an understanding of the magnetic field effect. ©1998 American Institute of Physics.
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