Open AccessPlateau-Rayleigh Instability of Ferrofluid Drop-Like Aggregates in Zero Magnetic Field
Author(s) -
А. С. Иванов
Publication year - 2019
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/581/1/012019
Subject(s) - ferrofluid , instability , surface tension , drop (telecommunication) , magnetic field , condensed matter physics , plateau (mathematics) , phase transition , materials science , rayleigh scattering , chemistry , chemical physics , thermodynamics , mechanics , optics , physics , computer science , telecommunications , mathematical analysis , mathematics , quantum mechanics
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.