[chakroun]

Hi guys,
I'm working on the modeling of LNG gas dispersion.
Before getting to that point, I'm trying to simulate the air flow only in the domain .I'm using a power law for the air inlet velocity((power law: v= 5(z/50)0.55m/s). The boundary conditions are wall for ground, pressure outlet

for air at the end of the domain and I'm not sure about the top boundary condition and the sides. I found in one paper that the boundary condition for top and sides should be air wind velocity tangential to the surface. When I used the same function of air velocity for top and sides I got wrong results of the air profile ( air flow is not the same at the outlet as inlet because fluent introduced the same flow at top and lateral boundary conditions).
Can some one help me to obtain a developed air profile at the end of the domain ?
Thanks