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Neumann boundary

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5 years 5 months ago #1257 by ddrake
Neumann boundary was created by ddrake
Hi,

I understand that if we apply a Neumann boundary condition to the Poisson problem, there is no unique solution. I was wondering if there is a standard way to solve this problem in NGSolve by specifying a specific value for say a boundary point.

Best,
Dow
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5 years 5 months ago - 5 years 5 months ago #1258 by christopher
Replied by christopher on topic Neumann boundary
You can set one vertex dof to dirichlet with
Code:
fes.FreeDofs()[dofnr] = False
Then the problem should be solvable and the solution is 0 in that vertex.

Best
Christopher
Last edit: 5 years 5 months ago by christopher.
The following user(s) said Thank You: ddrake, liubenyuan
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