Porous Latent Heat Fusion#
Porous Latent Heat Fusion = CONSTANT <integer> <float> [E/M]
Description / Usage#
This required card is used to specify the model for the latent heat of fusion (or freezing) 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:
Name of the constant latent heat of fusion model.
The following is a sample input card:
Porous Latent Heat Fusion = CONSTANT 0 1000.2
See the equation below for the diffusivity model that this card represents.
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. Fusion implies a liquid to solid transition. It is envisioned that this card will someday be used for porous flow in mushy zones of solidifying metals, or the freezing of water in a porous solid.