[petsc-users] Inquiry about PetscDS for discretization of second order system

[Gong Yujie]

Dear PETSc developer group,

I'd like to inquire that if PetscDSSetResidual can be used for second order system? Are there a DS function that is related to solve a system that contains second order time derivative such as time dependent linear elasticity problem.

I found there is tutorial for elastostatics problem using PetscDS but this doesn't involve time discretization. In TS, there is alpha method for solving second order system, but I haven't found a tutorial using DS yet. Is there a way to combine PetscDS with the alpha method in TS?

Best Regards,
Yujie
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