Barry, Thank you very much!
On Mon, Aug 25, 2008 at 1:19 AM, Barry Smith <bsmith at mcs.anl.gov> wrote: > > You need to determine where the floating point exception occurs. On some > computers > this is easy, just run the code in the debugger and use the debugger option > to trap floating > point exceptions. Unfortunately this may not always be possible: in that > case I would > start with running with -info -snes_monitor -ksp_monitor to see what is > happening before > the floating point exception that is causing the difficulty. > > Barry > > > On Aug 24, 2008, at 7:18 AM, Shengyong wrote: > > Hi, >> >> Does anyone happen to meet such convergency problem? I have implemented a >> petsc solver >> to simulate driven cavity flow problem. I use petsc to solve the poisson >> equation. When I set the space step >> dx = 1 or 0.01, it works fine. However, when i tried to simulate a meso >> scale problem, i set dx = 0.0001, dt = 0.00001. >> I got a error : floating point execption.. >> >> Does anyone point me out how to solve this problem ? >> >> >> >> >> >> ong >> Solidification Simulation Lab, >> State Key Lab of Mould & Die Technology, >> Huazhong Univ. of Sci. & Tech. China >> > > -- Pang Shengyong Solidification Simulation Lab, State Key Lab of Mould & Die Technology, Huazhong Univ. of Sci. & Tech. China -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.mcs.anl.gov/pipermail/petsc-users/attachments/20080825/e6ec99b2/attachment.htm>
