Error during reading file from CAD

[alips123]

Hello all,
I am facing with some error I can't solve.
I am trying to model a tunnel in FDS. I have used cad, created stl file, runed the code and found faces and vertexes:
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388,389,390,
391,392,393,
394,395,396,
397,398,399,
400,401,402,
403,404,405,
406,407,408,
409,410,411,
412,413,414,
415,416,417,
418,419,420,
421,422,423,
424,425,426,
427,428,429,
430,431,432,
433,434,435,
436,437,438,
439,440,441,
442,443,444/

But When I tun my file, I am facing with this error:
ERROR(729): GEOM ID='Tunnel':
Geometry volume too small.
Face normals are probably pointing in the wrong direction.
Check they point towards the gas phase.

I thought it should be because of accuracy and reduced the accuracy to one tenth, removed many verts and faces. Then I got the other error:
ERROR(701): problem with GEOM Tunnel, local SURF_ID index for FACE 2out of bounds. (CHID: curved_tunnel)

ERROR: FDS was improperly set-up - FDS stopped (CHID: curved_tunnel)

I don't know how can I solve this issue. I will be really appreciated for any response.

Regards.

[mcgratta]

Create the simplest possible input file that demonstrates the problem.

[alips123]

Thank you professor,
It is not too hard. I had done simpler sample before. I was wondering could you please help me to figure out what should I do to solve this bug here? I have put all the codes here.

[marcosvanella]

@alips123 Make sure FACES has the 3 node connectivities + the index to SURF_ID, e.g. N1 N2 N3 SID (4 integers per triangle). Have a look at the user guide where VERTS and FACES is described.

[alips123]

Thank you professor.
I add it but still I am getting some other errors.

The whole code is:

&HEAD CHID='curved_tunnel', TITLE='Curved Tunnel Fire Simulation' /
&TIME T_END=100. /
&MISC TMPA=20. /
&MESH ID='M1', IJK=400,400,160, XB=-10,10,-10,10,0,8 /

&MATL ID='CONCRETE', DENSITY=2400., CONDUCTIVITY=1.5, SPECIFIC_HEAT=0.88 /
&SURF ID='CONCRETE', MATL_ID='CONCRETE', THICKNESS=0.5, RGB=128,128,128 /

&GEOM ID='Tunnel'
SURF_ID='CONCRETE'
VERTS= 10.0000,5.0378,0.0000,
0.0000,5.0378,0.0000,
10.0000,5.0986,0.4764,
10.0000,5.0986,0.4764,
0.0000,5.0378,0.0000,
0.0000,5.0986,0.4764,
10.0000,5.0986,0.4764,
0.0000,5.0986,0.4764,
10.0000,5.0689,0.9558,
10.0000,5.0689,0.9558,
0.0000,5.0986,0.4764,
0.0000,5.0689,0.9558,
10.0000,5.0689,0.9558,
0.0000,5.0689,0.9558,
10.0000,4.9499,1.4211,
10.0000,4.9499,1.4211,
0.0000,5.0689,0.9558,
0.0000,4.9499,1.4211,
10.0000,4.9499,1.4211,
0.0000,4.9499,1.4211,
10.0000,4.7458,1.8559,
10.0000,4.7458,1.8559,
0.0000,4.9499,1.4211,
0.0000,4.7458,1.8559,
10.0000,4.7458,1.8559,
0.0000,4.7458,1.8559,
10.0000,4.4637,2.2446,
10.0000,4.4637,2.2446,
0.0000,4.7458,1.8559,
0.0000,4.4637,2.2446,
10.0000,4.4637,2.2446,
0.0000,4.4637,2.2446,
10.0000,4.1138,2.5736,
10.0000,4.1138,2.5736,
0.0000,4.4637,2.2446,
0.0000,4.1138,2.5736,
10.0000,4.1138,2.5736,
0.0000,4.1138,2.5736,
10.0000,3.7084,2.8311,
10.0000,3.7084,2.8311,
0.0000,4.1138,2.5736,
0.0000,3.7084,2.8311,
10.0000,3.7084,2.8311,
0.0000,3.7084,2.8311,
10.0000,3.2619,3.0081,
10.0000,3.2619,3.0081,
0.0000,3.7084,2.8311,
0.0000,3.2619,3.0081,
10.0000,3.2619,3.0081,
0.0000,3.2619,3.0081,
10.0000,2.7901,3.0981,
10.0000,2.7901,3.0981,
0.0000,3.2619,3.0081,
0.0000,2.7901,3.0981,
10.0000,2.7901,3.0981,
0.0000,2.7901,3.0981,
10.0000,2.3098,3.0981,
10.0000,2.3098,3.0981,
0.0000,2.7901,3.0981,
0.0000,2.3098,3.0981,
10.0000,2.3098,3.0981,
0.0000,2.3098,3.0981,
10.0000,1.8380,3.0081,
10.0000,1.8380,3.0081,
0.0000,2.3098,3.0981,
0.0000,1.8380,3.0081,
10.0000,1.8380,3.0081,
0.0000,1.8380,3.0081,
10.0000,1.3915,2.8311,
10.0000,1.3915,2.8311,
0.0000,1.8380,3.0081,
0.0000,1.3915,2.8311,
10.0000,1.3915,2.8311,
0.0000,1.3915,2.8311,
10.0000,0.9861,2.5736,
10.0000,0.9861,2.5736,
0.0000,1.3915,2.8311,
0.0000,0.9861,2.5736,
10.0000,0.9861,2.5736,
0.0000,0.9861,2.5736,
10.0000,0.6362,2.2446,
10.0000,0.6362,2.2446,
0.0000,0.9861,2.5736,
0.0000,0.6362,2.2446,
10.0000,0.6362,2.2446,
0.0000,0.6362,2.2446,
10.0000,0.3541,1.8559,
10.0000,0.3541,1.8559,
0.0000,0.6362,2.2446,
0.0000,0.3541,1.8559,
10.0000,0.3541,1.8559,
0.0000,0.3541,1.8559,
10.0000,0.1500,1.4211,
10.0000,0.1500,1.4211,
0.0000,0.3541,1.8559,
0.0000,0.1500,1.4211,
10.0000,0.1500,1.4211,
0.0000,0.1500,1.4211,
10.0000,0.0310,0.9558,
10.0000,0.0310,0.9558,
0.0000,0.1500,1.4211,
0.0000,0.0310,0.9558,
10.0000,0.0310,0.9558,
0.0000,0.0310,0.9558,
10.0000,0.0014,0.4764,
10.0000,0.0014,0.4764,
0.0000,0.0310,0.9558,
0.0000,0.0014,0.4764,
10.0000,0.0014,0.4764,
0.0000,0.0014,0.4764,
10.0000,0.0621,0.0000,
10.0000,0.0621,0.0000,
0.0000,0.0014,0.4764,
0.0000,0.0621,0.0000,
10.0000,0.5500,0.1097,
0.0000,0.5500,0.1097,
10.0000,0.5001,0.5382,
10.0000,0.5001,0.5382,
0.0000,0.5500,0.1097,
0.0000,0.5001,0.5382,
10.0000,0.5001,0.5382,
0.0000,0.5001,0.5382,
10.0000,0.5410,0.9676,
10.0000,0.5410,0.9676,
0.0000,0.5001,0.5382,
0.0000,0.5410,0.9676,
10.0000,0.5410,0.9676,
0.0000,0.5410,0.9676,
10.0000,0.6709,1.3790,
10.0000,0.6709,1.3790,
0.0000,0.5410,0.9676,
0.0000,0.6709,1.3790,
10.0000,0.6709,1.3790,
0.0000,0.6709,1.3790,
10.0000,0.8840,1.7541,
10.0000,0.8840,1.7541,
0.0000,0.6709,1.3790,
0.0000,0.8840,1.7541,
10.0000,0.8840,1.7541,
0.0000,0.8840,1.7541,
10.0000,1.1709,2.0762,
10.0000,1.1709,2.0762,
0.0000,0.8840,1.7541,
0.0000,1.1709,2.0762,
10.0000,1.1709,2.0762,
0.0000,1.1709,2.0762,
10.0000,1.5188,2.3313,
10.0000,1.5188,2.3313,
0.0000,1.1709,2.0762,
0.0000,1.5188,2.3313,
10.0000,1.5188,2.3313,
0.0000,1.5188,2.3313,
10.0000,1.9124,2.5078,
10.0000,1.9124,2.5078,
0.0000,1.5188,2.3313,
0.0000,1.9124,2.5078,
10.0000,1.9124,2.5078,
0.0000,1.9124,2.5078,
10.0000,2.3343,2.5981,
10.0000,2.3343,2.5981,
0.0000,1.9124,2.5078,
0.0000,2.3343,2.5981,
10.0000,2.3343,2.5981,
0.0000,2.3343,2.5981,
10.0000,2.7656,2.5981,
10.0000,2.7656,2.5981,
0.0000,2.3343,2.5981,
0.0000,2.7656,2.5981,
10.0000,2.7656,2.5981,
0.0000,2.7656,2.5981,
10.0000,3.1875,2.5078,
10.0000,3.1875,2.5078,
0.0000,2.7656,2.5981,
0.0000,3.1875,2.5078,
10.0000,3.1875,2.5078,
0.0000,3.1875,2.5078,
10.0000,3.5811,2.3313,
10.0000,3.5811,2.3313,
0.0000,3.1875,2.5078,
0.0000,3.5811,2.3313,
10.0000,3.5811,2.3313,
0.0000,3.5811,2.3313,
10.0000,3.9290,2.0762,
10.0000,3.9290,2.0762,
0.0000,3.5811,2.3313,
0.0000,3.9290,2.0762,
10.0000,3.9290,2.0762,
0.0000,3.9290,2.0762,
10.0000,4.2159,1.7541,
10.0000,4.2159,1.7541,
0.0000,3.9290,2.0762,
0.0000,4.2159,1.7541,
10.0000,4.2159,1.7541,
0.0000,4.2159,1.7541,
10.0000,4.4290,1.3790,
10.0000,4.4290,1.3790,
0.0000,4.2159,1.7541,
0.0000,4.4290,1.3790,
10.0000,4.4290,1.3790,
0.0000,4.4290,1.3790,
10.0000,4.5589,0.9676,
10.0000,4.5589,0.9676,
0.0000,4.4290,1.3790,
0.0000,4.5589,0.9676,
10.0000,4.5589,0.9676,
0.0000,4.5589,0.9676,
10.0000,4.5998,0.5382,
10.0000,4.5998,0.5382,
0.0000,4.5589,0.9676,
0.0000,4.5998,0.5382,
10.0000,4.5998,0.5382,
0.0000,4.5998,0.5382,
10.0000,4.5500,0.1097,
10.0000,4.5500,0.1097,
0.0000,4.5998,0.5382,
0.0000,4.5500,0.1097,
0.0000,5.0378,0.0000,
0.0000,4.5500,0.1097,
0.0000,5.0986,0.4764,
0.0000,5.0986,0.4764,
0.0000,4.5500,0.1097,
0.0000,4.5998,0.5382,
0.0000,5.0986,0.4764,
0.0000,4.5998,0.5382,
0.0000,5.0689,0.9558,
0.0000,5.0689,0.9558,
0.0000,4.5998,0.5382,
0.0000,4.5589,0.9676,
0.0000,5.0689,0.9558,
0.0000,4.5589,0.9676,
0.0000,4.9499,1.4211,
0.0000,4.9499,1.4211,
0.0000,4.5589,0.9676,
0.0000,4.4290,1.3790,
0.0000,4.9499,1.4211,
0.0000,4.4290,1.3790,
0.0000,4.7458,1.8559,
0.0000,4.7458,1.8559,
0.0000,4.4290,1.3790,
0.0000,4.2159,1.7541,
0.0000,4.7458,1.8559,
0.0000,4.2159,1.7541,
0.0000,4.4637,2.2446,
0.0000,4.4637,2.2446,
0.0000,4.2159,1.7541,
0.0000,3.9290,2.0762,
0.0000,4.4637,2.2446,
0.0000,3.9290,2.0762,
0.0000,4.1138,2.5736,
0.0000,4.1138,2.5736,
0.0000,3.9290,2.0762,
0.0000,3.5811,2.3313,
0.0000,4.1138,2.5736,
0.0000,3.5811,2.3313,
0.0000,3.7084,2.8311,
0.0000,3.7084,2.8311,
0.0000,3.5811,2.3313,
0.0000,3.1875,2.5078,
0.0000,3.7084,2.8311,
0.0000,3.1875,2.5078,
0.0000,3.2619,3.0081,
0.0000,3.2619,3.0081,
0.0000,3.1875,2.5078,
0.0000,2.7656,2.5981,
0.0000,3.2619,3.0081,
0.0000,2.7656,2.5981,
0.0000,2.7901,3.0981,
0.0000,2.7901,3.0981,
0.0000,2.7656,2.5981,
0.0000,2.3098,3.0981,
0.0000,2.3098,3.0981,
0.0000,2.7656,2.5981,
0.0000,2.3343,2.5981,
0.0000,2.3098,3.0981,
0.0000,2.3343,2.5981,
0.0000,1.8380,3.0081,
0.0000,1.8380,3.0081,
0.0000,2.3343,2.5981,
0.0000,1.9124,2.5078,
0.0000,1.8380,3.0081,
0.0000,1.9124,2.5078,
0.0000,1.3915,2.8311,
0.0000,1.3915,2.8311,
0.0000,1.9124,2.5078,
0.0000,1.5188,2.3313,
0.0000,1.3915,2.8311,
0.0000,1.5188,2.3313,
0.0000,0.9861,2.5736,
0.0000,0.9861,2.5736,
0.0000,1.5188,2.3313,
0.0000,1.1709,2.0762,
0.0000,0.9861,2.5736,
0.0000,1.1709,2.0762,
0.0000,0.6362,2.2446,
0.0000,0.6362,2.2446,
0.0000,1.1709,2.0762,
0.0000,0.8840,1.7541,
0.0000,0.6362,2.2446,
0.0000,0.8840,1.7541,
0.0000,0.3541,1.8559,
0.0000,0.3541,1.8559,
0.0000,0.8840,1.7541,
0.0000,0.6709,1.3790,
0.0000,0.3541,1.8559,
0.0000,0.6709,1.3790,
0.0000,0.1500,1.4211,
0.0000,0.1500,1.4211,
0.0000,0.6709,1.3790,
0.0000,0.5410,0.9676,
0.0000,0.1500,1.4211,
0.0000,0.5410,0.9676,
0.0000,0.0310,0.9558,
0.0000,0.0310,0.9558,
0.0000,0.5410,0.9676,
0.0000,0.5001,0.5382,
0.0000,0.0310,0.9558,
0.0000,0.5001,0.5382,
0.0000,0.0014,0.4764,
0.0000,0.0014,0.4764,
0.0000,0.5001,0.5382,
0.0000,0.5500,0.1097,
0.0000,0.0014,0.4764,
0.0000,0.5500,0.1097,
0.0000,0.0621,0.0000,
0.0000,0.5500,0.1097,
10.0000,0.5500,0.1097,
0.0000,0.0621,0.0000,
0.0000,0.0621,0.0000,
10.0000,0.5500,0.1097,
10.0000,0.0621,0.0000,
10.0000,0.0621,0.0000,
10.0000,0.5500,0.1097,
10.0000,0.0014,0.4764,
10.0000,0.0014,0.4764,
10.0000,0.5500,0.1097,
10.0000,0.5001,0.5382,
10.0000,0.0014,0.4764,
10.0000,0.5001,0.5382,
10.0000,0.0310,0.9558,
10.0000,0.0310,0.9558,
10.0000,0.5001,0.5382,
10.0000,0.5410,0.9676,
10.0000,0.0310,0.9558,
10.0000,0.5410,0.9676,
10.0000,0.1500,1.4211,
10.0000,0.1500,1.4211,
10.0000,0.5410,0.9676,
10.0000,0.6709,1.3790,
10.0000,0.1500,1.4211,
10.0000,0.6709,1.3790,
10.0000,0.3541,1.8559,
10.0000,0.3541,1.8559,
10.0000,0.6709,1.3790,
10.0000,0.8840,1.7541,
10.0000,0.3541,1.8559,
10.0000,0.8840,1.7541,
10.0000,0.6362,2.2446,
10.0000,0.6362,2.2446,
10.0000,0.8840,1.7541,
10.0000,1.1709,2.0762,
10.0000,0.6362,2.2446,
10.0000,1.1709,2.0762,
10.0000,0.9861,2.5736,
10.0000,0.9861,2.5736,
10.0000,1.1709,2.0762,
10.0000,1.5188,2.3313,
10.0000,0.9861,2.5736,
10.0000,1.5188,2.3313,
10.0000,1.3915,2.8311,
10.0000,1.3915,2.8311,
10.0000,1.5188,2.3313,
10.0000,1.9124,2.5078,
10.0000,1.3915,2.8311,
10.0000,1.9124,2.5078,
10.0000,1.8380,3.0081,
10.0000,1.8380,3.0081,
10.0000,1.9124,2.5078,
10.0000,2.3343,2.5981,
10.0000,1.8380,3.0081,
10.0000,2.3343,2.5981,
10.0000,2.3098,3.0981,
10.0000,2.3098,3.0981,
10.0000,2.3343,2.5981,
10.0000,2.7656,2.5981,
10.0000,2.3098,3.0981,
10.0000,2.7656,2.5981,
10.0000,2.7901,3.0981,
10.0000,2.7901,3.0981,
10.0000,2.7656,2.5981,
10.0000,3.2619,3.0081,
10.0000,3.2619,3.0081,
10.0000,2.7656,2.5981,
10.0000,3.1875,2.5078,
10.0000,3.2619,3.0081,
10.0000,3.1875,2.5078,
10.0000,3.7084,2.8311,
10.0000,3.7084,2.8311,
10.0000,3.1875,2.5078,
10.0000,3.5811,2.3313,
10.0000,3.7084,2.8311,
10.0000,3.5811,2.3313,
10.0000,4.1138,2.5736,
10.0000,4.1138,2.5736,
10.0000,3.5811,2.3313,
10.0000,3.9290,2.0762,
10.0000,4.1138,2.5736,
10.0000,3.9290,2.0762,
10.0000,4.4637,2.2446,
10.0000,4.4637,2.2446,
10.0000,3.9290,2.0762,
10.0000,4.2159,1.7541,
10.0000,4.4637,2.2446,
10.0000,4.2159,1.7541,
10.0000,4.7458,1.8559,
10.0000,4.7458,1.8559,
10.0000,4.2159,1.7541,
10.0000,4.4290,1.3790,
10.0000,4.7458,1.8559,
10.0000,4.4290,1.3790,
10.0000,4.9499,1.4211,
10.0000,4.9499,1.4211,
10.0000,4.4290,1.3790,
10.0000,4.5589,0.9676,
10.0000,4.9499,1.4211,
10.0000,4.5589,0.9676,
10.0000,5.0689,0.9558,
10.0000,5.0689,0.9558,
10.0000,4.5589,0.9676,
10.0000,4.5998,0.5382,
10.0000,5.0689,0.9558,
10.0000,4.5998,0.5382,
10.0000,5.0986,0.4764,
10.0000,5.0986,0.4764,
10.0000,4.5998,0.5382,
10.0000,4.5500,0.1097,
10.0000,5.0986,0.4764,
10.0000,4.5500,0.1097,
10.0000,5.0378,0.0000,
10.0000,4.5500,0.1097,
0.0000,4.5500,0.1097,
10.0000,5.0378,0.0000,
10.0000,5.0378,0.0000,
0.0000,4.5500,0.1097,
0.0000,5.0378,0.0000,

FACES= 1,2,3,1,
4,5,6,1,
7,8,9,1,
10,11,12,1,
13,14,15,1,
16,17,18,1,
19,20,21,1,
22,23,24,1,
25,26,27,1,
28,29,30,1,
31,32,33,1,
34,35,36,1,
37,38,39,1,
40,41,42,1,
43,44,45,1,
46,47,48,1,
49,50,51,1,
52,53,54,1,
55,56,57,1,
58,59,60,1,
61,62,63,1,
64,65,66,1,
67,68,69,1,
70,71,72,1,
73,74,75,1,
76,77,78,1,
79,80,81,1,
82,83,84,1,
85,86,87,1,
88,89,90,1,
91,92,93,1,
94,95,96,1,
97,98,99,1,
100,101,102,1,
103,104,105,1,
106,107,108,1,
109,110,111,1,
112,113,114,1,
115,116,117,1,
118,119,120,1,
121,122,123,1,
124,125,126,1,
127,128,129,1,
130,131,132,1,
133,134,135,1,
136,137,138,1,
139,140,141,1,
142,143,144,1,
145,146,147,1,
148,149,150,1,
151,152,153,1,
154,155,156,1,
157,158,159,1,
160,161,162,1,
163,164,165,1,
166,167,168,1,
169,170,171,1,
172,173,174,1,
175,176,177,1,
178,179,180,1,
181,182,183,1,
184,185,186,1,
187,188,189,1,
190,191,192,1,
193,194,195,1,
196,197,198,1,
199,200,201,1,
202,203,204,1,
205,206,207,1,
208,209,210,1,
211,212,213,1,
214,215,216,1,
217,218,219,1,
220,221,222,1,
223,224,225,1,
226,227,228,1,
229,230,231,1,
232,233,234,1,
235,236,237,1,
238,239,240,1,
241,242,243,1,
244,245,246,1,
247,248,249,1,
250,251,252,1,
253,254,255,1,
256,257,258,1,
259,260,261,1,
262,263,264,1,
265,266,267,1,
268,269,270,1,
271,272,273,1,
274,275,276,1,
277,278,279,1,
280,281,282,1,
283,284,285,1,
286,287,288,1,
289,290,291,1,
292,293,294,1,
295,296,297,1,
298,299,300,1,
301,302,303,1,
304,305,306,1,
307,308,309,1,
310,311,312,1,
313,314,315,1,
316,317,318,1,
319,320,321,1,
322,323,324,1,
325,326,327,1,
328,329,330,1,
331,332,333,1,
334,335,336,1,
337,338,339,1,
340,341,342,1,
343,344,345,1,
346,347,348,1,
349,350,351,1,
352,353,354,1,
355,356,357,1,
358,359,360,1,
361,362,363,1,
364,365,366,1,
367,368,369,1,
370,371,372,1,
373,374,375,1,
376,377,378,1,
379,380,381,1,
382,383,384,1,
385,386,387,1,
388,389,390,1,
391,392,393,1,
394,395,396,1,
397,398,399,1,
400,401,402,1,
403,404,405,1,
406,407,408,1,
409,410,411,1,
412,413,414,1,
415,416,417,1,
418,419,420,1,
421,422,423,1,
424,425,426,1,
427,428,429,1,
430,431,432,1,
433,434,435,1,
436,437,438,1,
439,440,441,1,
442,443,444,1/

&VENT MB='XMIN', SURF_ID='OPEN' /
&VENT MB='XMAX', SURF_ID='OPEN' /
&VENT MB='YMIN', SURF_ID='OPEN' /
&VENT MB='YMAX', SURF_ID='OPEN' /
&VENT MB='ZMAX', SURF_ID='OPEN' /

&TAIL /

The error I am getting is:

ERROR(730): GEOM ID='Tunnel':
Open geometry at edge with nodes: NOD1 1 ( 10.000 5.038 0.000), NOD2 2 ( 0.000 5.038 0.000)

(CHID: curved_tunnel)

ERROR: FDS was improperly set-up - FDS stopped (CHID: curved_tunnel)

[marcosvanella]

Looks like something is not right with your geometry. An edge between nodes 1-2 in triangle 1 does not have a counter edge 2-1 in another triangle. The geometry needs to be a volume that you represent by its surface, which is triangulated. So you will have a closed surface around this volume (can't be zero). You can't have a triangle have an edge that is not also boundary of another triangle. Read sections 7.3.2, 7.3.3 in the nightly user guide here.
Looking at your geometry (run the case with T_END=0) it seems to me you are either duplicating the VERTS and using different indexes for edges defined on different triangles, or the connectivity array is not right. Vertices should be unique.
Also a mesh 400x400x160 cells is to large, split it ni several meshes with 40^3 to 50^3 cells.