I tried SolutionTransfer class, but because the DoFHandler is set in the
constructor and assumed to be refined (or coarsen), we cannot use that
solution to interpolate to a completely different mesh. Instead, a solution
is to use VectorTools::interpolate_to_different_mesh() to a mesh that stays
constant:
Vector<double> interpolated_solution;
interpolated_solution.reinit(dof_handler_export.n_dofs());
VectorTools::interpolate_to_different_mesh(dof_handler, solution,
dof_handler_export, interpolated_solution);
The result can be interpolated using vtkTemporalInterpolator. I uploaded the
result at 60fps of step-26 here: https://www.youtube.com/watch?v=1jUUlwOA2fU
Cheers,
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