Re: [Libmesh-users] Solutions to different meshes

[Roy S. <roy...@ic...>]

On Thu, 3 Sep 2009, Andrea Hawkins wrote:

> I am wondering if there is a simple or "almost" simple way to read a
> solution defined on one mesh onto a different mesh.

Probably not, unless you have a real loose definition of "almost".

Is straight interpolation good enough?  If so, then read the old mesh
and solution in, create a MeshFunction from them, create the new mesh,
and use System::project_solution() with function pointers that call
that MeshFunction.  If not, then you'll probably still want to create
the MeshFunction, but evaluate it at quadrature points for whatever
projection problem you need to solve.

See exact_solution.C for an inefficient but parallel-compatible way to
create the MeshFunction.
---
Roy