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,