[jaason]

Hi Foamers,
I'm trying to create a code to calculate the force and started out with Mach.C and altered it. I have a volScalarField of the differential Force in the x direction for all control volumes in the mesh.

How can I pick out certain points in my Force volScalarField and sum them?

I did some searching online and tried using the sytax F[cellI] and
F.mesh().C()[cellI] where F is the volScalarField.

I tried outputting the 80th entry in the field Info << F.mesh().C()[80] << endl
but the post processor would not compile.

Sorry for the lengthiness I basically just want to access 80 individual points in the volScalarField sum them and output that data to the terminal.

any advice would be greatly appreciated maybe I don't have an appropriate header?

Headers I'm using:
Vector.H
calc.H
fvc.H

[jaason]

I figured it out had to switch it over to a scalarField to access the points then I could use indices with the scalarField. It had to be set equal to the internalfield of the volScalarField.

 scalarField intF=f.internalfield()