ElmerGUI includes ElmerVTK under the 'Run' menu. ElmerVTK is able to create isosurface plots. Using your gmsh file, and increasing the radius from 0.65 to 12, ElmerVTK shows a nice plot of the potential isosurface, using clip of course. Does this help?
Rich.
- isosurface-elmervtk.png (134.85 KiB) Viewed 251 times