AN UPSCALING TECHNIQUE TO PREDICT THE MOISTURE PERMEABILITY OF HETEROGENEOUS POROUS MEDIA

摘要

In this paper we present an upscaling technique to model moisture transfer in micro-heterogeneous porous media. The material analysed is Savonnieres: a French layered oolitic limestone. Due to the complex micro-structure of the material the moisture permeability can not uniquely be determined based on indirect measurement data. To overcome this problem we present a technique based on the modelling of transport phenomena on the meso-scale. This technique allows to determine an effective macroscopic permeability based on the geometric configuration and the permeability of the composing constituents.