[petsc-users] 2D ploar domain

[Amir]

Hello
I have a 2D polar computational domain, which equation specified on a 
tensor-product mesh.As I increase the number of nodes at the near center, I 
encounter that the LineSearch which I use generallly as bt, does not go well. 
In fact, I would not be able to converge. Do you have any idea on this?
Thanks
Amir