I am running an 2D incompressible Navier Stokes simulation with a dimensionless setup and using the AerForces filter. 

I am trying to reproduce results from the literature that use the drag coefficient defined as Cd = 2*Fd/(rho*U*U*D), where Fd is the drag force per unit of length and D is the diameter of a cylinder. I wish to know whether the value exported to the file DragLift.fce is half the Cd as defined previously or the Cd itself. I think it is the former, but I would like a confirmation.

For reference, I am sending a snippet of the session xml file.

<SOLVERINFO>

            <I PROPERTY="SolverType"                    VALUE="VelocityCorrectionScheme" />
            <I PROPERTY="EQTYPE"                        VALUE="UnsteadyNavierStokes"     />
            <I PROPERTY="EvolutionOperator"             VALUE="Nonlinear"                />
            <I PROPERTY="Projection"                    VALUE="Galerkin"                 />
            <I PROPERTY="GlobalSysSoln"                 VALUE="DirectStaticCond"         />
            <I PROPERTY="TimeIntegrationMethod"         VALUE="IMEXOrder2"               />
            <I PROPERTY="Driver"                        VALUE="Standard"                 />
            <I PROPERTY="SPECTRALHPDEALIASING"          VALUE="True"                     />

</SOLVERINFO>
       
<PARAMETERS>
            <P> TimeStep       = 0.01                </P>
            <P> FinTime        = 20                   </P>
            <P> NumSteps       = FinTime/TimeStep     </P>
            <P> IO_CheckSteps  = NumSteps/20          </P>
            <P> IO_InfoSteps   = 5                    </P>
            <P> IO_FiltersInfoSteps   = 100           </P>
            <P> IO_CFLSteps    = 10                  </P>
            <P> Re             = 66                   </P>
            <P> Kinvis         = 1/Re                 </P>
 </PARAMETERS>

    <FILTERS>
       <FILTER TYPE="AeroForces">
            <PARAM NAME="OutputFile">       DragLift  </PARAM>
            <PARAM NAME="OutputFrequency">  5         </PARAM>
            <PARAM NAME="Boundary">         B[3]      </PARAM>
        </FILTER>