In the Constituent Materials tab, the Invading Fluid and the Displaced Fluid can be entered.

If the phase distribution under the Wetting Parameters tab is chosen by Pore Size, the displaced fluid must be present in the structure. If it is taken from Simulated Wetting Process, then both fluids can be changed and do not have to be already present in the current structure.

No more settings need to be done as the diffusivity is always set to 1.