Model descriptions

Two different models were implemented for which the melt velocity was determined. The first of these was an extension of the ridge model implemented in Milestone 1, but with a constant porosity field, such that the solution was static in time. This model can be found in:

     /Magma/Models/Milestone3/Ridge2D_FieldBasedConstantPorosity

The second model was an extension of the porosity driven Stokes flow with a Gaussian initial distribution implemented in milestone 2. This model resides at:

     /Magma/Models/Milestone3/FieldBasedPorosityDrivenFlow2D

Since the melt velocity is decoupled from the McKenzie equations, it is relatively simple to calculate, provided that the pressure and solid velocity fields have already been accurately determined. As such no tests were applied to validate its accuracy, however qualitatively their behavior is observed to be correct.