[shereez234]

Hello Foamers;

Hope every one is doing great. I am having a bit of a hard time trying to understand mapfields. Hope some one can point out the right direction or give me some information.

Say for example I have a mesh and results for Angle of Attack 6 degrees, and then 7 degrees. I wanna map angle 6's results to 7 to speed up the convergence of angle 7 case. The only change in the mesh is the position change of elements due to the slight rotation. the number of elements do not change.

So what is it that I need to do? Do I need a mapDict? Well, Thanks in advance guys.

Regards

Shereez

[Artur]

mapFields uses geometric information to establish cell-to-cell connectivity between the two meshes, i.e. it will disregard the fact that the other case is at a different angle of incidence. If it's the same mesh which only gets rotated I suppose you could try to copy the fields directly, change the BC values and see if it speeds things up? It seems like an ugly hack though, probably safer to just run potentialFoam on the new case to start with. Could be worth a try though.

A

[shereez234]

Yeah I have been working on this for a while. Actually, You don't even need to mapFields if it is the same mesh that's getting rotated. Because the values are permanent to every cell regardless of any transformation that is brought.

It does speed up the convergenc by a good amount (initial transient bit can be avoided in Unsteady problems).

Thanks for the answer Artur.

Regards

Shereez