首页   按字顺浏览 期刊浏览 卷期浏览 Determination of surface tension from the shape oscillations of an electromagnetically ...
Determination of surface tension from the shape oscillations of an electromagnetically levitated droplet

 

作者: Y. Bayazitoglu,   U. B. R. Sathuvalli,   P. V. R. Suryanarayana,   G. F. Mitchell,  

 

期刊: Physics of Fluids  (AIP Available online 1996)
卷期: Volume 8, issue 2  

页码: 370-383

 

ISSN:1070-6631

 

年代: 1996

 

DOI:10.1063/1.868791

 

出版商: AIP

 

数据来源: AIP

 

摘要:

In the fundamental (l=2) mode, the frequency spectrum of a magnetically levitated inviscid droplet exhibits three distinct peaks. If the modes that correspond to each of these peaks is known, the surface tension of the droplet may be calculated. In experiments that make use of this principle, there is nounambiguousmethod of assigning mode numbers to these peaks. The dynamics of the oscillating droplet depend on the magnetic pressure on the droplet surface. Consequently, the order of the peaks in thel=2 mode oscillations is determined by the magnetic pressure distribution. In this paper, the magnetic pressure distribution on the surface of the droplet is calculated as a function of the parameters that govern the external magnetic field. The frequencies of the droplet oscillation and its static shape deformation are also expressed in terms of these same parameters. The frequencies of oscillation are used to determine the surface tension of the liquid droplet. Finally, the magnetic pressure distribution on the droplet is shown to yield the well‐known ‘‘pear‐like’’ shape that is assumed by liquid metal droplets in a conical levitator. ©1996 American Institute of Physics.

 

点击下载:  PDF (249KB)



返 回