On Tue, May 15, 2012 at 12:26 AM, behzad baghapour < behzad.baghapour at gmail.com> wrote:
> Thanks. Actually the jacobian which I obtain has a part of transient as J > = M/dt + dR/dQ. Then I want to eliminate the time effect before calculating > R^T*J*dQ as the descent direction. So, which way is correct in my case? This sounds like a good way to stagnate. Many transient problems _require_ the "steady-state" residual to increase (climbing a hill) before it can decrease. Also, I can't tell from your description if you want the search direction to come from the transient or steady problem. -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.mcs.anl.gov/pipermail/petsc-users/attachments/20120515/cd451057/attachment.htm>
