What are the default boundary conditions used in openCARP

Question

Hello

where can I find what the boundary conditions are that are used in both monodomain and bidomain simulations? Can these ones be changed?

Thanks a lot in advance!

Cheers

Lore

Answer 1

By default, homogeneous Neumann boundary conditions (no flux) are assumed. This could indeed be described more clearly in the manual. Contributions are appreciated:

https://git.opencarp.org/openCARP/openCARP/-/tree/master/docs/manual

https://git.opencarp.org/openCARP/openCARP/-/issues/140

These examples provide further information on more complex boundary condition scenarios:

https://opencarp.org/documentation/examples/02_ep_tissue/13_laplace

https://opencarp.org/documentation/examples/02_ep_tissue/07b_periodic

Comments

Thank you for the quick reply!

Are these boundary conditions the ones from myocardium to bath or for the end of the bath or both?

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For bidomain with bath, the "end of the bath" has homogeneous Neumann boundary conditions for Phi_e.
At the tissue to bath boundary, Phi_i has homogeneous Neumann boundary conditions as well whereas for Phi_e continuity from tissue to bath is enforced.

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Added with https://git.opencarp.org/openCARP/openCARP/-/commit/aecc6c616ec70cb0efb7f1ae130be57a2885ba05