[petsc-users] TS (arkimex) question

[Jed Brown]

"Constantinescu, Emil M." <emconsta at anl.gov> writes:

> On 1/19/20 11:38 AM, Mark Adams wrote:
> Can you recommend a higher order method that I might try?
>
>
> Mark, all of 2e, 3, 4, 5 are high order with really good properties. They have error estimators that are cheaper but less reliable (most of the time work well enough).

BDF2 may also be a good choice.  Unless I'm misreading the logs, it
seems to allege that SNES convergence is problematic before time
discretization error.  Mark, it would help to know more about the
dominant modes in the system.