[petsc-dev] Jacobian lag persist with ROSW method

[Jed Brown]

Mani Chandra <mc0710 at gmail.com> writes:

> It doesn't converge at all if I use a first order method. The time step
> required now is incredibly small. Is that an indication that something
> might be wrong? 

Perhaps.  Limiters are very nonlinear, but they should still converge.

> In general should convergence be better with lower order?

Nonlinear solver convergence should be no worse, and is simpler to
understand.
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