Filtration of the extracting agent in porous particles with entrapped gas at low-frequency pressure oscillations in the extractor

A model of the process of filtration of the extracting agent in porous particles with entrapped gas was developed. This model takes into account pressure oscillations in the extractor.Translated from Zhurnal Prikladnoi Khimii, Vol. 77, No. 10, 2004, pp. 1676–1680.Original Russian Text Copyright © 2004 by Ivanov, Shvyrev, Artemova.     

Statistical Modeling in the Problem of Excitation of Fields by Random Sources on a Surface

We develop a method for statistical modeling of the emission of noise fields by sources located on a surface and consider the problem of sound-wave emission by the ocean surface. We also construct a model of distribution of the pressure and vibrational velocity of the sound field in a medium on the basis of randomization of the spectral density of pressure fluctuations on the surface. The obtained samples are exact solutions of the wave equation. The behavior of some statistical moments of the simulated field is studied.