UDS - Calculating Face Normal
 

Hi,

I'd like to know how to calculate the (unit) normal to a face using a Fluent macro/function from within a v5.4 user defined function.

I'd like to do this for the face f, passed by Fluent to the function DEFINE_UDS_FLUX(uds_flux,f,thread,i), so as to calculate the flux as a function of the face's orientation.

Any help much appreciated,

Thanks

Greg Perkins.