Theory for the Moist Porous Media Version of the Heat and Moisture Transport Interface
The Moist Porous Media version of the Heat and Moisture multiphysics coupling implements the following equations in domains for heat and moisture transport:
(4-173)
(4-174)
(4-175)
(4-176)
Under the equilibrium hypothesis, Gevap is obtained from the vapor mass conservation equation:
When this hypothesis is not applicable, Gevap is defined as
See Theory for Moisture Transport in Porous Media for details.
It also solves the equation for moisture transport in hygroscopic porous media, given in Equation 4-142 for the equilibrium hypothesis, and in Equation 4-140 and Equation 4-141 for the nonequilibrium hypothesis.
See Theory for Heat Transfer in Moist Porous Media for more details about the notations.
The heat transfer and moisture transport equations are coupled through:
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The definition of the effective thermal properties accounting for moisture content in liquid and gas phases
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The liquid water saturation and velocity field used to define the convective heat flux
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The diffusive flux of enthalpy in moist air and the liquid capillary flux (Equation 4-175)
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The definition of the latent heat source from the evaporation source in domains (Equation 4-176)
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The definition of the vapor saturation in function of the temperature