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-   -   Segmentation fault using non-conformgrid interface (http://www.cfd-online.com/Forums/fluent/36946-segmentation-fault-using-non-conformgrid-interface.html)

Anindya June 13, 2005 18:49

Segmentation fault using non-conformgrid interface
 
I try to join 2 nonconformal interfaces using tmerge. I open up the merged case file in fluent and set the grid interface. As such 2 walls (boundary zones) are created (say wall-4 and wall-5). I change the boundary condition of one of the walls (wall-5) to say pressure. But the following error message shows up when I try to run it. The only time when Fluent runs ok is when I keep both of them as walls. Could someone please let me know what the problem might be. This happens with 6.2 but never happened with 6.1 version of fluent.

Thanks for your help. Anindya

iter continuity x-velocity y-velocity z-velocity k epsilon time/iter

reversed flow in 115 faces on pressure-inlet 5.

================================================== ============================ Stack backtrace generated for process id 4570 on signal 1 : /usr/local/Fluent.Inc/fluent6.2.16/lnx86/3d/fluent.6.2.16[0x863cbff] Please include this information with any bug report you file on this issue! ================================================== ============================

/usr/local/Fluent.Inc/fluent6.2.16/lnx86/3d/fluent.6.2.16[0x863ca92] /lib/i686/libpthread.so.0[0x94a097] /lib/i686/libc.so.6[0xc5f898] /usr/local/Fluent.Inc/fluent6.2.16/lnx86/3d/fluent.6.2.16(Flow_Iterate+0x298)[0x814a5f8] /usr/local/Fluent.Inc/fluent6.2.16/lnx86/3d/fluent.6.2.16[0x81804c6] /usr/local/Fluent.Inc/fluent6.2.16/lnx86/3d/fluent.6.2.16(eval+0xb6f)[0x86694b6] /usr/local/Fluent.Inc/fluent6.2.16/lnx86/3d/fluent.6.2.16(eval+0xb6f)[0x86694b6] /usr/local/Fluent.Inc/fluent6.2.16/lnx86/3d/fluent.6.2.16(eval+0xd4a)[0x8669691] /usr/local/Fluent.Inc/fluent6.2.16/lnx86/3d/fluent.6.2.16(eval+0xf0b)[0x8669852] /usr/local/Fluent.Inc/fluent6.2.16/lnx86/3d/fluent.6.2.16[0x8669aca] /usr/local/Fluent.Inc/fluent6.2.16/lnx86/3d/fluent.6.2.16(eval_errprotect+0x41)[0x8669b7b] /usr/local/Fluent.Inc/fluent6.2.16/lnx86/3d/fluent.6.2.16(eval+0xb6f)[0x86694b6] /usr/local/Fluent.Inc/fluent6.2.16/lnx86/3d/fluent.6.2.16(eval+0x2f3)[0x8668c3a] /usr/local/Fluent.Inc/fluent6.2.16/lnx86/3d/fluent.6.2.16(eval+0x102a)[0x8669971] /usr/local/Fluent.Inc/fluent6.2.16/lnx86/3d/fluent.6.2.16(eval+0xf0b)[0x8669852]

Error: fluent.6.2.16 received a fatal signal (SEGMENTATION VIOLATION). Error Object: #f

zxaar June 14, 2005 01:05

Re: Segmentation fault using non-conformgrid inter
 
before making the interface try this on command line

(rpsetvar 'nonconformal/cell-faces 0)

this should fix the problem, but if the problem is not solved by this and you can read the total mesh into gambit. then save your case and read the total mesh into gambit by mesh import (use the cas you saved in import..it is important), then rewrite the mesh, read again the mesh, and before creating interface again use the command i mentioned above , the problem should be fixed now.


anindya June 14, 2005 01:33

Re: Segmentation fault using non-conformgrid inter
 
Thanks a lot zxaar. I will try your suggestions.

Anindya June 14, 2005 16:40

Not working
 
Hi Zxaar,

I tried it but it still does not work.

Anindya

Mahesh June 15, 2005 07:57

Re: Segmentation fault using non-conformgrid inter
 
Does this mean you want to define the BC at the non-conformal interface? As far as non-conformal interface is concerned, 6.2 is better than 6.1

Anindya June 15, 2005 17:40

Re: Segmentation fault using non-conformgrid inter
 
Yes. I am trying to simulate a moving jet using sliding mesh and nonconformal grid interface. It worked in 6.1 but gives segmentation violation error in 6.2. What I am trying to do is briefly descibed in my first post in this thread.

You can give me some suggestions that I can try.

Thanks

Anindya


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