How does the capillary pressure affect MOOSE converge?

[robo-boluo]

Greetings!

I recently engaged with the 1D injection porous flow example located in the Moose folder (modules/porous_flow/test/tests/fluidstate/theis_brineco2_nonisothermal.i). Specifically, I adjusted the length parameter from 200m to 100m within the [mesh] section and added capillary pressure . However, this alteration led to convergence issues. I'm now curious about the capillary pressure controlling convergence performance.

The changes:

[pc] # type = PorousFlowCapillaryPressureConst # pc = 0 type = PorousFlowCapillaryPressureVG alpha = 5.099e-5 m = 0.457 sat_lr = 0.0 pc_max = 1e7 []

Results:

Thank you,

[GiudGiud]

Hello

There's a page on porous flow converge issues if you want to check that out
https://mooseframework.inl.gov/modules/porous_flow/tutorial_02.html