[petsc-users] Order Adapting BDF timestepping

[Constantinescu, Emil M.]

No, the current implementation does not seem to adapt the order, only 
the time step. With increasing order, you typically get less and less 
stability. There is no method of order 7 or higher. Order 6 is barely 
stable. So it's not a lot of wiggle room to adapt the order in there.

Emil

On 10/12/18 7:38 AM, Moritz.Huck at isea.rwth-aachen.de wrote:
> Hi,
> 
> does the BDF alogrithm adapt the order?
> 
> If not are there method to get  error estimates for orders higher and 
> lower than the current one?
> 
> (or adaption strategies which dont need these estimates)?
> 
> Thanks,
> 
> Moritz
>