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.
Stationary study fails, but time-dependent study completes
Posted 9 nov 2022, 18:01 GMT-5 Studies & Solvers Version 6.0 2 Replies
Please login with a confirmed email address before reporting spam
When running a stationary study, I receive an error:
Feature: Stationary Solver Failed to find a solution. Singular matrix.
However, when running a time-dependent study, I do not receive any errors and the study finishes.
What could be causing the stationary study to fail in this situation? My model involves a solid block with wells and fractures inside. It couples Solid Mechanics and Darcy's Law with the Poroelasticity interface.
Thank you.
Please login with a confirmed email address before reporting spam
Chances are large that you have too few constraints, so that there are possible rigid body modes. Then a dynamic analysis will run, since the inertial forces will ensure a force balance.
-------------------Henrik Sönnerlind
COMSOL
Please login with a confirmed email address before reporting spam
Thank you, Henrik Sonnerlind! I solved the issue. My matrix permeability was set to 0 m^2 and I solved it by making it a very small value instead, 1e-100.
Thank you for your response!