OS0814 Analysis of Steady Hygrothermal Field in a Strip Subjected to Severe Hygrothermal Gap on its Surfaces

The one-dimensional steady hygrothermal field in a porous infinite strip subjected to severe hygrothermal gap on its surfaces considering nonlinear coupling between heat and moisture is analyzed. Heat and moisture aie considered to diffuse macroscopically. Moreover, moisture is considered to take two phases, namely, dissolved and gaseous phases. Both types of moisture are considered to have different diffusivities. To consider the coupling between heat and moisture, the heat generation by transformation from gaseous moisture into dissolved one is considered as well as the transformation from dissolved moisture into gaseous one due to temperature change. The balance between dissolved and gaseous moisture is determined by an equilibrium condition. The effects of the coupling properties and the difference between the diffusivities of moisture on the distributions of heat and moisture are investigated.