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Pressure-Outlet boundary condition for species

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Old   July 29, 2010, 06:08
Default Pressure-Outlet boundary condition for species
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Dear colleagues,

Does somebody aware if it is correct to put species mass fraction equal 1 at the outlet-pressure BC while two species in the flow are presented? E.g. I have two inlets, one pure air and the second one of pure helium. Then how could I manage the BC at outlet for the species fractions? Is it wrong to put air species=const=1?

Thanks in advance.
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fluent, pressure-outlet, species

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