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Loss coefficient for stairways

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Old   November 16, 2017, 14:02
Default Loss coefficient for stairways
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Hi there!

I am modeling a tunnel which has a stairway with several floors, typical 2 landing closed well.

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

Do you know any available literature for such coefficients?

Thanks
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