[petsc-users] TS Time Derivative after solved step

[Karol Lewandowski]

Hi, I am developing a program for solving a time-dependent problem using TS solver. At some point, after a successful step, I would like to compute the error indicator which involves time derivatives. I tried to use routines like TSSetPostStep(), however, they do not give me access to vector ts_u_t.

Is there a way to compute the post-step time derivative without copying the vectors (like ts_u_t, ts_u_tt) at each step?


Kind regards,


Karol

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