Viele Grüße,
Timo
> Am 17.12.2018 um 07:44 schrieb lc <[email protected]>:
>
> Good morning,
>
>
> I have a general question.
>
> What is the highest formal order of accuracy in space and time in DuMux? As I
> read, using central FV and Box model and FE and explicit/implicit Euler the
> maximum should be 2. Is it correct?
Hi Lorenzo,
yes, 2nd order in space and 1st order in time. There is currently no FE scheme.
>
> Which is the combination which allows to get the most accurate results in
> these terms?
>
> Has never been required to go at higher order? If no why?
The solutions in multiphase simulations often have low regularity because of
discontinuous parameters and/or jumps in primary variables such as saturation,
so higher order doesn’t help. In cases with higher regularity, it has been
enough so far to just refine the grid (AFAIK).
If you want to implement higher order FE scheme such as higher order DG for
porous media, have a look at dune-pdelab / dune-fem (general discretization
modules) or just dune-functions (global/grid finite element functions).
Hope that helps
Timo
>
>
> Kind regards,
>
> Lorenzo
>
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