### how to write the code

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### 1 Answer

3

Since your question provides no background as to what you want to achieve and you're not even trying to define the quantities you introduce, I'll just assume that this boundary condition comes up naturally in the weak formulation of your problem (I'm thinking Maxwell equations and vector potential?). If that is the case, you'll want to include the boundary integral

For increasing the chances of replies to your future posts -- and I am also referring to this question of yours -- try to follow the guidelines from

`cross(u,n)*ds`

in your weak formulation, where`n = FacetNormal(mesh)`

is the outward unit normal.

For increasing the chances of replies to your future posts -- and I am also referring to this question of yours -- try to follow the guidelines from

**Read before posting: How do I get by my question answered?**2

OMG that rabbit!!!!!!!!!!!

written
4 weeks ago by
pf4d

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