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!!

Use Pressure Outlet.

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?