to do this I often save my results in an ascii file (x,y,value) and use the Scattered2DDataInterpolator ( http://elmerice.elmerfem.org/wiki/doku. ... :scattered
) to interpolate in the new mesh. This solver use external librairies that implement Natural neighbours and cubic spline interpolation methods.
I also this that there is a ResultToResult.F90 file under fem/src.
You can read in the header of the file:
!> Stand-alone program for Elmer results file to Elmer results processing
!> file conversion. The meshes may be different for the two result files.
seems interesting but haven't tried yet.
But it always may be problematic when we are only interesting by interpolating plane view 2D fields only on boundaries.