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Old   September 19, 2007, 13:54
Default outlet boundary condition
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I'm modeling a cylindrical combustion chamber with inlet velocity B.C and outlet pressure B.C. in the finite rate chemistry mode. Do i need to set the mass fraction of species at the outlet? If yes, how should i know them? Fluent tutorial_11 has set the B.C. at the outlet 0.23 for O2 and 0.77% N2, something seems to be wrong! where are CO2 and H2O?
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Old   September 19, 2007, 16:02
Default Re: outlet boundary condition
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you do not need to set the specie mass fractions at the outlet, they will be calculated in the simulation instead
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Old   September 22, 2007, 13:08
Default Re: outlet boundary condition
red lemon
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The specified values are those to be used for cases of reverse flow on outlets. In such cases some faces become inlets and need corresponding inlets species fractions.
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