This condition is a Fourier-Robin one. There is specific bricks in getfem for that (or of course you can just add the weak form with a linear term) on the considered boundary.
Best regards,
Yves
De: "Bourriche Lahoussaine" <lahoussaine.bourriche@etu.toulouse-inp.fr>
À: "getfem-users" <getfem-users@nongnu.org>
Envoyé: Mercredi 15 Juin 2022 10:56:32
Objet: Neumann condition
Hello everybody;
How i can implement Neumann boundary condition, who depends in the variable, for example
for a variable T :
k*n*nabla(T)=h(T-T_ext)
and
n the outward unit normal vectorI want to apply this condition in the boundary of an object and not in the boundary of the whole geometrie