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OGS
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Effective medium property obtained by volume fraction averaging
This property must be a medium property. It computes the effective property based on the phase properties as a volume fraction weighted average in the following form
X_{\mathrm{eff}} = \phi_\mathrm{p}\,X_\mathrm{pR} + \phi_\mathrm{f}\,X_\mathrm{fR} + \phi_\mathrm{l}\,X_\mathrm{lR} = (1-\phi) X_\mathrm{pR} + \phi_\mathrm{f}\,X_\mathrm{fR} + (\phi - \phi_\mathrm{f}) X_\mathrm{lR}
where \phi is the porosity (pore space volume fraction), \phi_\mathrm{p} is the porous solid skeleton volume fraction, \phi_\mathrm{f} is the frozen volume fraction, \phi_\mathrm{l} is the liquid one. \mathrm{R} stands for the real/pure phase property.
1.12.0