====== Liquid fraction ======

The class ''LiquidFractionMatLaw'' manages all liquid fraction evolution laws, specific to thixotropic materials. These laws are described below.

:!: Careful: Only works if used with thixotropic materials (''ThixoEvpIsoHHypoMaterial'' or  ''ThixoTmEvpIsoHHypoMaterial'').   



===== ScheilLiquidFractionMatLaw =====

=== Description ===

Scheil law.
$$
f_l = \left( \frac{T-T_s}{T_l-T_s} \right) ^{\frac{1}{r-1}}
$$

=== Parameters ===
^   Name  ^     Metafor Code  ^  Dependency ^
|     Solidus $ T_l $                            |  ''FL_TS''     |      ''TM/TO''     |
|     Liquidus $ T_l $                           |  ''FL_TL''     |      ''TM/TO''     |
|     Equilibrium partition ratio $ r $  |  ''FL_EXP''    |      ''TM/TO''     |

===== LashkariEffectiveLiquidFractionMatLaw =====

=== Description ===

Computes the **effective liquid fraction** $ f_l^{eff} $, excluding liquid entrapped inside solid grains, which does not contribute to the flow. Liquid fraction $ f_l $ is computed with Scheil law. Some liquid is released when bonds are broken, so $f_l^{eff} $ depends on the cohesion degree $ \lambda $.

$$
f_l^{eff} = f_l [1-\lambda(1-f_l)]
$$