CP on CAARC building
 

I am modeling the Caarc Building using FEM using SA turbulence model. However my Cp values are offset from data results. I.e if I choose an arbitrary p_inf value I get reasonable agreement, however that is not physical. Any suggestion on what to Change would be much appreciated.




real
https://www.dropbox.com/s/4zjdsdnkw2z0c52/Real.JPG
https://www.dropbox.com/s/4zjdsdnkw2z0c52/Real.JPG
offset
https://www.dropbox.com/s/6k7duxouz59vhmr/offset.JPG
https://www.dropbox.com/s/6k7duxouz59vhmr/offset.JPG

scale=400
Inflow:
v_x=log law u_star=0.6 z_0=0.2/scale
nu_t=kappa*u_star*z or nu_t=kappa*u_star*z*(1-z/z_g)^4
Outflow:
pressure=0
Sides:
slip
Bottom:
wall function-roughness 30*z_0
Top
specified v_x and nu_t