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setting Boundary condition for additional variable

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Old   May 18, 2011, 05:04
Default setting Boundary condition for additional variable
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anonymous
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HE ALL ;
I want to set Boundary condition for pollutant ( CO) as aditional variable my line source is in the ground a street at level z=0 .
my Boundary parts are
INLET, OUTLET, symetry ( SIDES 1 et 2) , GROUND , TOP , SOURCE
the emission rate from the source is 0.0001 Kg/s.
If any one experienced can help
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Old   May 18, 2011, 06:08
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Sounds straight forward. Have you done the tutorials? That will give you some tips on how to get started.

Or what specific problem do you have in setting it up?
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Old   May 19, 2011, 04:44
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thanks ;
firstly, I took a look in tutorial , there is an exemple wich treate smoke dispersion. My case deel with a tracer gaz (SF6) realised from a line source within a street. the emission rate is 0.0001 kg/m^3. To simulate the concentration of SF6 I used an additional varaiable CSF6 with a transport equation .
I choose for CSF6 BC :
INLET Value CSF6 =0
OUTLET ZERO FLUX
SYMETRY ( SIDES) ZERO FLUX
TOP ZERO FLUX
GROUND AND LINE SOURCE CSF6 = 0
the simulate concentration CSF6 = f(Z) seems wrong because the minimum conentration value was located at level z=0 wich is not correct.
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