On Sun, 26 Mar 2006, li pan wrote:
> if I'm not wrong, in ex13 no variable (neither
> old_local_solution, nor current_local_solution) saved
> the global accumulated solution from all the past time
> steps. If I'm right, and ex13 is a incremental
> solution for nonlinear problem, why no accumulated
> solution has been used?
Most problems (including example 13) don't need anything other than
the solution from the previous timestep, and storing solution and mesh
data from every previous timestep would waste a lot of RAM if it was
done unnecessarily. If you've really got a constitutive equation that
depends on the whole time history of your problem, you'll have to add
the storage for it yourself.