On 5/22/23 06:21, Abbas Ballout wrote:
How does get_function_gradients calculateboth component gradient at a face?
Abbas,
since
u_h(x) = \sum_j U_j \varphi_j(x)
you get the gradient as
\nabla u_h(x) = \sum_j U_j \nabla\varphi_j(x)
and the only other thing you need to know is that \varphi_j is defined by
mapping shape functions from the reference cell to the real cell.
But I suspect that you have a reason to ask that question. What is it really
that you are after?
Best
W.
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Wolfgang Bangerth email: bange...@colostate.edu
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