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Boundary conditions for crossflow of wind

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Old   February 3, 2005, 14:23
Default Boundary conditions for crossflow of wind
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Hi all,

I am trying to simulate the effect of crosswind on a open combustion flame (vertical flame). The wind entrances the domain by the left side of the domain, so a specifi velocity inlet is assumed as boundary condition in this left side.

However, I don't really know what boundary condition to use for the right side (or wind outlet): I think I have 3 options:

1) Pressure outlet (e.g., pressure known)

2) Outflow (e.g., pressure and velocity unknown?)

3) Negative velocity inlet?

Notice that my domain is only 0.3 m width, and the vertical flame is burning inside that domain.

Any advise would be helpful. Thanks!!
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Old   February 3, 2005, 14:29
Default Re: Boundary conditions for crossflow of wind
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Use Pressure Outlet.
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Old   February 3, 2005, 14:40
Default Re: Boundary conditions for crossflow of wind
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Thanks anindya. Can you briefly tell me why pressure outlet? Do you think that for strong wind the pressure is still 1 atm at the outlet?

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