Plateau-Rayleigh Instability of Ferrofluid Drop-Like Aggregates in Zero Magnetic Field

21st Winter School on Continuous Media Mechanics

计算机技术

Ivanov, A.S.^1

Inst. of Continuous Media Mechanics Ural Br. of Russ. Acad. of Sci. the Affiliate of Perm Fed. Sci. Res. Ctr., 1 Korolev str., Perm, Russia^1

关键词: Applied magnetic fields;    Drop-like aggregates;    Experimental investigations;    Field-induced phase transition;    High magnetic fields;    Inter-particle interaction;    Rayleigh instability;    Zero magnetic fields;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/581/1/012019/pdf
DOI  :  10.1088/1757-899X/581/1/012019

学科分类：计算机科学（综合）

来源: IOP

【 摘 要 】

Experimental investigation was carried out in order to study the properties of droplike aggregates-the needle-shaped drops of condensed phase, which appear in magnetic fluids undergoing field-induced phase transition of the gas-liquid type. When the applied magnetic field is removed, the needle-shaped aggregates demonstrate the Plateau-Rayleigh instability and disintegrate into series of separate spherical drops due to the surface tension σ at the interface between the gas and liquid phases. The surface tension entirely depends on interparticle interactions, thus experimental investigation of σ allows us to analyse the influence of temperature and magnetic field on the interparticle interactions. It is shown that drop-like aggregates condensed at high temperature demonstrate higher surface tension, than the aggregates condensed at low temperature. This anomalous behaviour can be attributed to the high magnetic field intensity needed to cause the phase transition at high temperature.