Re: Constrain combined derivatives of multi-variables

Hi Daniel, Thanks for your reply. My equations are : or (2 * mu + Lambda) * u,11 + mu * u,22 + (mu + Lambda) * v,12 = 0 (2 * mu + Lambda) * v,22 + mu * v,11 + (mu + Lambda) * u,21 = 0 I implement as: mesh = Grid2D(dx=dx,dy=dy,nx=nx,ny=ny) u = CellVariable(name=u,mesh=mesh,hasOld=1,rank=0) v =

Re: Constrain combined derivatives of multi-variables

On Wed, Jun 25, 2014 at 10:12 AM, Ronghai Wu ronghai...@fau.de wrote: Hi Daniel, Thanks for your reply. My equations are : (2 * mu + Lambda) * u,11 + mu * u,22 + (mu + Lambda) * v,12 = 0 (2 * mu + Lambda) * v,22 + mu * v,11 + (mu + Lambda) * u,21 = 0 Firstly, have you managed to solve

Re: robin boundary condition

Hi, I tried to solve a problem with a Robin Boundary condition in fipy. The physical problem is very simple, but I could not get the numerical solution to match the analytical solution. [image: Inline image 2] Is there something wrong with the way I set up the boundary condition? I've