Hi All,

My case is incompressible flow case and I am using two different velocity inlets, like:

---------------------------------------------------

 <REGION REF="0">        <!-- Inlet_upper  -->

        <D VAR="u" VALUE="3" />

        <D VAR="v" VALUE="0" />

        <N VAR="p" USERDEFINEDTYPE="H" VALUE="0"/>  

      </REGION>

      <REGION REF="1">        <!-- Inlet_lower  -->

        <D VAR="u" VALUE="1" />

        <D VAR="v" VALUE="0" />

        <N VAR="p" USERDEFINEDTYPE="H" VALUE="0"/>  

      </REGION>

-----------------------------------------------------

Re = value 

Kinvis = 1./Re 

My characteristic length D =1

and i have a problem in the Cd calculation even in Fd drag force value, I need to know when I am using Aerodynamics filter to calculate the forces around my body, which value i have from this filter???

this filter produce forces file, when i plot 1:4 columns ((4 is the total force in X direction)), is it the force directly (( the user guide says it calculate the pressure and viscous contributions are computed in each direction ))

which means it is the Fd

Cd = 2*Fd / (rho*U*U*A)

(( Note: for the Base cases as a Validation case using one inlet velocity value and with using velocity equal 1, I just take this forces results and multiplied by 2 it gives the write value

like considering 

rho =1

U=1

A=1))

I am using homogeneous expansion for my mesh in the spanwise direction, also when I tried to use two different spanwise lengths, the forces output was the same How????

is Aerodynamics filter give us Fd/A ?

Thanks,