On 4/26/19 9:48 AM, Gary Uppal wrote: > > Thanks for the reply. I get problems on less distorted meshes as well. > For example, in the mesh with a hole shown below. I eventually need > multiple holes and an advection term. Actually, the advection seems ok > and I mainly get issues when the diffusion is large. If the distorted > mesh is the issue, is there a better way to construct the geometry?
No, your mesh is reasonable. The question is not whether the error is large on cells that are not squares (it may be -- the finite element theory doesn't ever guarantee that the error is *small* on any given cell of any given mesh), but whether you get the *correct convergence order*. So looking at the solution on a single mesh is not a useful strategy -- the question is how the error decays as you refine the mesh. Best W. -- ------------------------------------------------------------------------ Wolfgang Bangerth email: [email protected] www: http://www.math.colostate.edu/~bangerth/ -- The deal.II project is located at http://www.dealii.org/ For mailing list/forum options, see https://groups.google.com/d/forum/dealii?hl=en --- You received this message because you are subscribed to the Google Groups "deal.II User Group" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
