*********************************** **Porous Latent Heat Vaporization** *********************************** :: Porous Latent Heat Vaporization = CONSTANT [E/M] ----------------------- **Description / Usage** ----------------------- This required card is used to specify the model for the latent heat of vaporization for each liquid solvent species in a partially saturated porous media flow problem, viz. *Media Type* card set to **POROUS_UNSATURATED** or **POROUS_TWO_PHASE**. As of 6/13/2002, we only allow single liquid phase solvent, and the porous enthalpy equation is being tested. Definitions of the input parameters are as follows: +----------------------------+-------------------------------------------------------------------------------------+ |**CONSTANT** |Name of the constant latent heat of vaporization model. | | | | | | * - the species equation of liquid phase solvent; MUST BE SET TO ZERO for | | | now. | | | * - the value of the latent heat of vaporization. | +----------------------------+-------------------------------------------------------------------------------------+ ------------ **Examples** ------------ The following is a sample input card: :: Porous Latent Heat Vaporization = CONSTANT 0 1000.2 See the equation below for the diffusivity model that this card represents. ------------------------- **Technical Discussion** ------------------------- First order phase change involves the adsorption or expulsion of heat. This thermal effect is modeled through the porous energy equation (see EQ cards; this equation was under development and testing as this manual was being assembled) with a source term that depends on the evaporation/condensation rate. -------------- **References** -------------- No References.