Boundary conditions for directional solidification

[matt_hughes]

What boundary conditions should i use to simulate directional solidification with a moving frame? I'm using iiii for phase field and iiif for concentration field, as these were the conditions for an example i found. Can someone confirm if this is right or should i be using different boundary conditions. My main concern is if both boundary conditions should be iiii or both should be iiif. Any help would be much appreciated.

Thanks,
Matthew

[janin]

Hi Matthew,
in simulations with moving frame option, the top boundary condition for phase field should always be 'i' (insulating). The concentration boundary condition can be set either to 'i', or to 'f'. The latter allows specifying a fixed concentration at the top boundary. However, assigning a fix value to the phase field wouldn't make sense.
Regards,
Janin