Dear Juzar. I am afraid there are no good preconditionners in ff3d for non "symmetric and positive definite" linear problems. Also the shape of the domain (very stretched) and the aspect ratio of the cells in the mesh do not help.
Sorry but I have no immediate solution to help you. Also, I founded something strange in your data file. You impose "dnu(u)" on the internal boundary 'T'. This corresponds up to the sign to the jump of the normal derivative across 'T'. Is that what you meant? Best regards, Stéphane. _______________________________________________ ff3d-users mailing list [email protected] http://lists.nongnu.org/mailman/listinfo/ff3d-users
