The Effect of Interface Tension on Forced Oscillations of Elongated Microdroplet Aggregates in Magnetic Fluids

Authors V.I. Drozdova , G.V. Shagrova , M.G. Romanenko

North-Caucasian Federal University, 2, Kulakova Pr., 355009 Stavropol, Russia

Issue Volume 6, Year 2014, Number 3
Dates Received 19 May 2014; revised manuscript received 03 July 2014; published online 15 July 2014
Citation V.I. Drozdova, G.V. Shagrova, M.G. Romanenko, J. Nano- Electron. Phys. 6 No 3, 03013 (2014)
PACS Number(s) 75.50.Mm, 79.60.Jv
Keywords Magnetic fluid (21) , Forced oscillations (2) , Interfacial tension, Microdroplet aggregate (2) .
Annotation Changes in the shape of microdroplet aggregates exposed to an alternating magnetic field with frequency from 0.01 to 1 Hz are investigated both experimentally and using a computer simulation. Microdroplet aggregates are spherical droplets of a highly concentrated magnetic fluid with a radius from one to several tens of microns dispersed in a liquid with a low concentration of magnetic particles. For values of interfacial tension σ > 2·10 – 6 N/m small oscillations in a weak alternating field could not be obtained, but periodic forced oscillations were obtained at strong elongations. Oscillations of elongated microdroplet aggregates are of a periodical nonsinusoidal type with higher harmonics and subharmonics in the spectrum.

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