[petsc-users] adaptive TS for IMEX

[Yuyun Yang]

Hello team,

I wonder whether TS currently can do error control for both explicit and implicit Runge-Kutta methods? I have a multi-physics problem that have some fields integrated explicitly and others implicitly, and sometimes they operate on very different time scales. The ODE solver I currently have (not PETSc) has error control only on the explicit variables and use the computed dt for the implicit variables, which results in some pretty sudden jumps in solutions. I wonder if there is an example in TS that could solve this problem?

Thank you!
Yuyun
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