code_saturne User's Forum

Hi all,
in syrthes i get this error when calculating the view factor for the radiation. The point i'm selecting is inside the "void" domain where the radiation happens between solid. why does it occurs? i'll attach a picture to see where is the point located (exactly in the middle of this volume, inside the middle ring).

the error is :

** connex_3d : the surfacique mesh is composed of 61 connex surfaces and 1 connex volumes

$$ ERROR INIORI_3D : Internal point 4
with coordinates xc=0.000000 , yc=0.000000 , zc=7.071068
is badly chosen, in the plane of face 4484

Hello,

Not sure I can help here (I have not used the radiative module of SYRTHES 3 in years, and have not used that of SYRTHES 4 yet), but could you tell us what version of SYRTHES you are using ?

Also, did you try shifting the point slightly, to try to avoid being in the indicated plane ?

Regards,

Yvan

Sorry for the lack of informations,
i'm using syrthes4, i changed the point position and no one works except for a position that is in touch with a corner of the furnace. i'll attach the image of the working point position. There is any relation why this point works?

I'm starting to look at this problem also because some rings are hotter than other in the same position. i.e 2 rings on the bottom left of the 3rd floor are hotter than the other sorrounding them both faced to the hot surface of the furnace. May this be a problem of radiation mesh (too much coarse) ?

thanks for any suggestion
Andrea

Hello,

I have no Idea what may cause this, but I'll try to remeber to suggest to the Syrthes developpers to take at look at this (they are out of office this week).

Best regards,

Yvan