Marangoni Effect-induced Unstable Phenomenon on the Interface of Liquid and Plasma

Marangoni Effect-induced Unstable Phenomenon on the Interface of Liquid and Plasma

侯尙延(Shang-Yan Hou)

指導教授 ： 曲宏宇

國立中正大學/理學院/物理學系/碩士(2014年)

摘要

無資料

關鍵字

電漿

並列摘要

The viscous fingers induced by Saffman-Taylor instability have been widely
investigated for decades. We investigate the interactions between plasma and
oil with positive, negative and flat curvature of boundary. We show that there
are three phases during the evolution for fluctuating, fingering, and branching.
The fingering pattern is similar to the radial fingering in a Hele-shaw
cell. The fractal dimension in the bubble-typed system and the drop-typed
system are both about 1.74. The dependence of the wavelength of the fingering
boundary is experimentally discussed. The bright spots and gas bubble
are observed at the interface, and the drop area decreases by plasma local
heating. The reduced surface tension pressure from the local plasma heating
is suspected of being responsible for the growth of the radial fingering and
the branching oil drop. The gas density variation on the interface is observed
by a Schlieren system. The particle image velocimetry is used to observe the
flow field in the liquid. The wavelength and the directions of flow field are
confirmed with the Marangoni effect. The ”plasma ring” which grows inward
and outward in the same time can be generated.
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並列關鍵字

Marangoni

參考文獻

patterns in self-extinguishing discharge avalanches. Phys-

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Fluid Mech, 522, 2006.

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in interfacial pattern formation. Phys. Rev. Lett, 55, 1985.