I am trying to impose Dirichlet boundary conditions along the faces of a cube built with the cube command. On faces 5 and 6 there is a single point where the function defining the boundary condition is not defined. It seems like this is causing me issues in obtaining a solution. I get no solution i…

Do you mean the BC is undefined or the BC is discontinuous? Discontinuity should not be an issue, but an undefined point on g should be.

right, yes sorry, it’s not a discontinuity. The function g is smooth everywhere where it is defined. But there is a single point on both of the faces 5 and 6 where it is not defined. Maybe I can replace it with some clever function. But I’m just wondering if it’s possible to impose the boundary co…

I think you make a mistake with +on(1,2,3,4,5,6, u = g) => you have Dirichlet BC on all point of face with label in 1,2,3,4,5,6, .

Thank you for your reply! And, yes, I agree that was definitely causing a problem, due to the function g being undefined at a single point on both the faces z = 0, 1. I do want to apply Dirichelt BC to all of the 6 faces. I decided to use a regularisation of g on the faces z = 0, 1. Also, it seems …

Hi @cmd , I’ve been working on a solution to my problem and I think I’ve isolated where my issues are. Would you mind taking a look at this post? [image] Piecewise function to eliminate singularity but singularity still causing problem General Discussion Dear community, I…

Dirichlet boundary function not defined over entire face

General Discussion

jsmacd January 24, 2023, 7:33pm 6

Hi @cmd, I’ve been working on a solution to my problem and I think I’ve isolated where my issues are. Would you mind taking a look at this post?

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Dirichlet boundary function not defined over entire face

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