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Stairway boundary condition

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Old   December 6, 2017, 14:46
Default Stairway boundary condition
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Hi there!

I am modeling a tunnel which has a stairway with several floors, typical 2 landing closed well. The stairway door area is quite smaller than the tunnel cross-section.

I was thinking of modeling a pressure boundary condition for the door, and use an appropriate loss coefficient based on the number of stair landings and geometry.

Let's say the stairway is open all the way up to street level, where relative pressure is 0. Would it be equivalent to set a pressure boundary of 0 with an appropriate loss coefficient? Any suggestions on how to model this?

Thanks in advance!
Sapere aude!
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