What is the index of your DAE? Can you show us code that exhibits this behavior?
"Moritz.Huck--- via petsc-users" <[email protected]> writes: > Hi, > > I am using the IMEX Runge Kutta to solve an implicit DAE (G=0). > > When I manually set the time step (TSSetTimestep) my solution jumps. > > If I go from a steady state to the same state, it oscilates a few time and > comes back to the steady solution. > > > > Can this be prevented? > > > > Thank you, > > Moritz > > >
