Resolving of Inverse Problem Based on the One Component Linear Diffusion Model of Water Vapor Into Cellular Concrete Sample

Abstract In this paper the applying of inverse problem for calculation of diffusion coefficient distribution into porous cylindrical sample into one-dimensinal case is demonstrated. The main purpose of work is concentrated for adaptation of well know diffusion equation with boundary conditions to experimentally obtained humidity profiles into porous sample. Empirical equations for diffusion coefficients according to obained humidity distribution are also reviewed. The proper physical interpretation of water vapor diffusion coefficient for coordinate and time dependencies is proposed. For this purpose the averaged quantities are introduced