Relaxation and power spectra of low-frequency fluctuations in foams |
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Authors: | A V Reshetnikov V N Skokov V P Koverda |
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Institution: | 1. Institute of Thermal Physics, Ural Branch, Russian Academy of Sciences, Ekaterinburg, 620016, Russia
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Abstract: | The dynamics of foam formation in a water-glycerin solution was studied to establish the relationship between the relaxation characteristics and the fluctuation power spectrum for a stochastic process. Foaming occurred during the dissociation of the gas-saturated solution and during bubbling of the solution through a porous filter. Two types of relaxation of the foam—exponential and power-law—were revealed. The power-law type of relaxation was observed upon exposure to ultrasound. Relationships between the type of relaxation and the distribution of lowfrequency fluctuations and power spectra was established. |
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