Hello. My field variable is
My field variable is a scalar (concentration). I need to calculate the
flux (which is -grad(C)) across one of the patches. I could use
patchIntegrate utility for integration over the patch but I need
gradient field for that.
foamCalc utility can calculate div(U) but only for vector fields. Is
there a way to automatically calculate the field of gradients having
the field of scalar?
Thank you for your help,
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