Method for calculating vapor diffusion coefficient for bound water in glass sand porous media

A method for calculating a vapor diffusion coefficient for bound water in a glass sand porous media, wherein the method comprises following steps:

• Step 1, calculating a total evaporation rate of the glass sand porous media and an evaporation rate of the bound water in the glass sand porous media;
• Step 2, calculating, according to the total evaporation rate of the glass sand porous media and the evaporation rate of the bound water in the glass sand porous media, an evaporation equivalent area of the bound water in the glass sand porous media;
• Step 3, establishing a dynamic relation between the evaporation rate of the bound water in the glass sand porous media and the evaporation equivalent area of the bound water in the glass sand porous media, and constructing a functional relation with the vapor diffusion coefficient for the bound water in the glass sand porous media as a dependent variable, and the evaporation rate of the bound water in the glass sand porous media as well as the evaporation equivalent area of the bound water in the glass sand porous media as independent variables;
• and
• Step 4, calculating, under a given condition of the evaporation rate of the bound water and the evaporation equivalent area of the bound water, the vapor diffusion coefficient for the bound water, according a functional relation of the vapor diffusion coefficient for the bound water with respect to the evaporation rate of the bound water and the evaporation equivalent area of the bound water.