MPL Freezing for Heat conduction with phase change
OGS has been extended to capture soil freezing phenomena. As a first step, only the thermal problem of a fully saturated porous medium is considered. It is a mixture of the three phases:
- Porous phase (the solid)
- Liquid phase (e.g. water)
- Frozen liquid phase (e.g. ice)
In order to obtain effective mixture properties, the MPL was equipped with new property classes such as
- TemperatureDependentFraction
- VolumeFractionAverage
- SpecificHeatCapacityWithLatentHeat
The effective (apparent) heat capacity includes the latent heat contribution from the phase change of the liquid/frozen pore phase. The heat conduction process was slightly modified to make use of the effective properties. Then, the thermal problem becomes nonlinear due to temperature-dependent thermal properties.
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Feature description was added to the changelog -
Both gtests and ctests covering the new properties/features were added. -
The new properties and features are documented.