Models for predicting the gas diffusion coefficient in undisturbed soil [articol]

Abstract

Overall objective of this project is mathematical modeling of diffusion processes, functional status and numerical methods development. This paper includes qualitative study to estimate the gas diffusion coefficient (DP/D0) in undisturbed soils. Based on empirical and numerical models of Penman [1940], Millington and Quirk [1960], Millington and Quirk [1961] and Moldrup [1999] has determined diffusion coefficient variation for different types of soil taken in the study. It was found that soil type, texture, structure, porosity, apparent density are the main factors influencing the diffusion and gas transport in porous media. The project conducted fundamental research on both general diffusion models and analysis models particulare major in science and engineering.