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Enclosed radiation

Hi all!

Got fatal error in temperature simulation when using enclosed radiation.

NX Nastran reports

Error 4690 (FOCOEL)

*** FATAL *** DIMENSIONAL LENGTH: 9.197843875E-12 IS SMALLER THAN "ZTOL": 1.000000013E-10
REASSIGN "ZTOL" ON VIEW3D BULK DATA TO BE SMALLER THAN THE DIMENSIONAL LENGTH.


Someone how know what the problem is?

BR

Per-Olov
2 REPLIES

Re: Enclosed radiation

Dear Per-Olov,
First time I see this error, it could be a question of scale or lack in units consistency, change your models units, for instance work in "milimeters" instead in "meters".
Best regards,
Blas.

Re: Enclosed radiation

Thanks, I was a little lazy, so I select feature instead of face in radiation. No it works when i select face.
Another strange thing is that i got lover temperature (-14,3 C) than ambient temperature in the results. I have set temp to +20 degress C in convection and body.
/Per-Olov