zakir hussain 
March 26, 2012 00:45 
the calculation of gradient
hello everybody
From 10.1.1.3 Control Volume Gradients of the CFXSover Theory Guide ,I know that:
( )= * ( n)
where n is the outward surface vector at ip,V is the volume of the control volume.
We can use the utility name USER_GETVAR to obtain the gradient we interest.what I want to know is how it calculate the gradient. What kind of algorithm does it use?Is it as the formulation above?
I have a source term like this:
source= ( A )
where is the value of the variable at the cell faces f, and A is the face area vectors
How can I implement it with fortran or something else?
Thank you very much!
zakir
