On 4/14/23 14:46, Houjun Wang wrote:
Is there any way to 'extrapolate' the field (from interior to the boundary)
such that the lower panel looks like the upper panel near the top boundary? Or
enforcing zero normal gradient near the top boundary for the bottom panel too.
Houjun,
I understand intuitively what you want, but in the end, in order to implement
something, you have to specify clearly and unambiguously in mathematical terms
what it is you want to do. So before we talk about how, can you clarify what
achieving "looks like the upper panel" would entail?
As for Neumann boundary conditions: You would first have to tell us how you
have computed the two panels, and then think about whether it makes sense from
a modeling perspective to choose one type of boundary conditions over another.
Best
Wolfgang
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Wolfgang Bangerth email: [email protected]
www: http://www.math.colostate.edu/~bangerth/
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