An error occurred while running example/IBFE/EX6

[Zhwe Sn]

Hi all, thanks for looking at this question. 

I am a newbie to FSI and IBM, and I am using IBAMR-0.16-deBUG version. I got an error when I tried to run IBFE/ex6, and I did not get the problem solved after I modified Dt.

Can anyone help me?

Thanks and regards

sun

+++++++++++++++++++++++++++++++++++++++++++++++++++
At beginning of timestep # 13
Simulation time is 0.00374766
P=00000:Program abort called in file ``/home/dyfluid/Code/IBAMR-0.16.0/src/IB/IBHierarchyIntegrator.cpp'' at line 212
P=00000:ERROR MESSAGE:
P=00000:IBHierarchyIntegrator::preprocessIntegrateHierarchy():  Time step size change encountered.
P=00000:Aborting.
P=00000:
[dyfluid:2231838] *** Process received signal ***
[dyfluid:2231838] Signal: Aborted (6)
[dyfluid:2231838] Signal code:  (-6)
[dyfluid:2231838] [ 0] /lib/x86_64-linux-gnu/libc.so.6(+0x42520)[0x755a9dc42520]
[dyfluid:2231838] [ 1] /lib/x86_64-linux-gnu/libc.so.6(pthread_kill+0x12c)[0x755a9dc969fc]
[dyfluid:2231838] [ 2] /lib/x86_64-linux-gnu/libc.so.6(raise+0x16)[0x755a9dc42476]
[dyfluid:2231838] [ 3] /lib/x86_64-linux-gnu/libc.so.6(abort+0xd3)[0x755a9dc287f3]
[dyfluid:2231838] [ 4] /home/dyfluid/Code/IBAMR-0.16.0/build-debug/lib/libIBTK2d.so(+0x8ba08f)[0x755aa30ba08f]
[dyfluid:2231838] [ 5] /home/dyfluid/Code/IBAMR-0.16.0/build-debug/lib/libIBAMR2d.so(_ZN5IBAMR21IBHierarchyIntegrator28preprocessIntegrateHierarchyEddi+0x76d)[0x755aa5350615]
[dyfluid:2231838] [ 6] /home/dyfluid/Code/IBAMR-0.16.0/build-debug/lib/libIBAMR2d.so(_ZN5IBAMR29IBExplicitHierarchyIntegrator28preprocessIntegrateHierarchyEddi+0x6f)[0x755aa51c086d]
[dyfluid:2231838] [ 7] /home/dyfluid/Code/IBAMR-0.16.0/build-debug/lib/libIBTK2d.so(_ZN4IBTK19HierarchyIntegrator16advanceHierarchyEd+0x9ca)[0x755aa35e2406]
[dyfluid:2231838] [ 8] ./main2d(+0xb1f5f)[0x64a53a539f5f]
[dyfluid:2231838] [ 9] /lib/x86_64-linux-gnu/libc.so.6(+0x29d90)[0x755a9dc29d90]
[dyfluid:2231838] [10] /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0x80)[0x755a9dc29e40]
[dyfluid:2231838] [11] ./main2d(+0xae105)[0x64a53a536105]
[dyfluid:2231838] *** End of error message ***

error code2  (here , ERROR_ON_DT_CHANGE         = FALSE)

+++++++++++++++++++++++++++++++++++++++++++++++++++
At beginning of timestep # 414
Simulation time is 0.02881

At end       of timestep # 414
Simulation time is 0.0288281
+++++++++++++++++++++++++++++++++++++++++++++++++++


Writing visualization files...


Writing state data...

[Boyce Griffith]

It looks like the input file needs to be updated — the time step size is likely too large. Please try reducing the time step size and re-running the example.

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[Zhwe Sn]

Thanks for your reply. your suggestion is correct.

I successfully ran the case (FEIB/ex6) by reducing the time step.

modified content (Dt=0.3*CFL_MAX*DX/U_MAX to 0.15*CFL_MAX*DX/U_MAX) 

Best Regards

sun