Express method of determine the diffusion coefficient of fractal materials

Abstract

The problem of penetration of liquid through technological materials whose solution is largely constrained by the lack of operational methods for the determination of material parameters is solved in this paper. The main purpose of research is to develop methods for the determination of the diffusion coefficients of fractal materials based on rapid experimentation with the mathematical model of the passage of moisture. On the base of the approximate solution of the diffusion equation relationship between the diffusion constants and parameters of the process at an early stage of the liquid absorption are obtained. It is proved that for determination of both the diffusion coefficients only one experimental parameter is enough. This parameter is the time to achieve a concentration at the inner surface to 0,4 of the main. The developed approach allows use of the initial stage of the experiment on the accumulation of moisture fractal material and may use a simplified approach to conducting experiments, which greatly simplifies and accelerates the process of determining the diffusion constants. The results of research can be applied by experts in the field of products of light industry, as well as in the systems of metrological provision of material constants determination.