What are the default conductivity values used by openCARP in a monodomain simulation, and how can I modify them?

Question

I am running monodomain simulations in openCARP using the Luo-Rudy 1991 model, but I cannot find clear documentation on the default conductivity values when they are not explicitly defined in the .par file.

I have checked the parameter list in the documentation,  but I cannot find references to sigma_i or sigma_e in the monodomain context.

My questions are:

1. What are the default intracellular and extracellular conductivity values used by openCARP in monodomain simulations?
2. How can I correctly modify these values in my setup?

Any help or documentation reference would be greatly appreciated.

Thanks in advance!

Answer 1

Conductivities are assigned to gRegions.

The default values can be queried from the help and found in chapter 15.2 of the manual:

https://opencarp.org/documentation/user-manual

If you don't define a region explicitly, the default values will be assigned to the whole mesh.

This example can be a good starting point: https://opencarp.org/documentation/examples/02_ep_tissue/05b_conductive_heterogeneity