[gshankarau]

Hi Friends,
I am trying to analyse the simplified car model of length 410mm in Ansys Fluent 15 and I am fixing the fluid velocity as 14.95 m/s and computational domain dimensions as L=2000mm, W=1200mm, H=1000mm and I calculated reynolds no as 4.207e5 and turbulent intensity as 0.0311 and hydraulic diameter as 1.090.
I had entered the boundary condition for Velocity inlet with above calculated values Turb.intensity, Hy dia, then pressure oulet with K and Epsilon as default values as 1 for both. I selected the whole car model alone for calculating Cd and Cl then result shows Cd value as 0.16 but the actual Cd value of the model is 0.3, So kindly anyone assist me that where I had done the mistake.
Formulas I had used are
Re No=(rho*14.95*0.41)/1.69e-5)
I=0.16(re)^(-1/8)
Hy dia=(4*1*1.2)/Perimeter of domain
Kindly anyone help me to solve the problem as soon as possible.

Thanks in advance.