Discussion Closed This discussion was created more than 6 months ago and has been closed. To start a new discussion with a link back to this one, click here.
Stress Dependent Fracture Width and Permeability
Posted 10.03.2021, 16:50 GMT-5 Geomechanics, Porous Media Flow, Parameters, Variables, & Functions 0 Replies
Please login with a confirmed email address before reporting spam
Hi,
I am having an issue with coupling fracture flow properties and the stress tensor in the poro-elasticity module. I have defined a matrix permeability as a constant value but the fracture width and permeability is dependent on the stress tensor (Barton-Bandis Model). The model runs successfully when the fracture width and permeability are set to constant values but fails to converge when they are set to equations that depend on the stress tensor (i.e., width = 1[mm] - ((-poro.sy) / (100[MPa/mm] + (-poro.sy/1[mm]))); and permeability = (width^2)/12).
What is the reason why the model fails to converge with a simple equation defining fracture width and permeability? I have tried defining an analytical function for each property based on the stress tensor with no luck. Any suggestions?
Hello Matt
Your Discussion has gone 30 days without a reply. If you still need help with COMSOL and have an on-subscription license, please visit our Support Center for help.
If you do not hold an on-subscription license, you may find an answer in another Discussion or in the Knowledge Base.