Poiseuille flow with shell failing

[YuVirtonomy]

shell problem

Thickness of shell
its seem there is some problem with shell_thickness = resolution_ref * 1.0,. In this condition, the shell wall is too weak to prevent fluid particles from penetrating the shell wall.

With shell_thickness = resolution_ref * 2.0, , the result seem more make sense And, shell can prevent the fluid from penetrating

The following result used shell_thickness = resolution_ref * 1.0;

The following results used shell_thickness = resolution_ref * 2.0;

[Xiangyu-Hu]

It seems that there is no test for the cases.

[YuVirtonomy]

It seems that there is no test for the cases.

The test case is in
tests/3d_examples/test_3d_poiseuille_flow_shell/poiseuille_flow_shell.cpp

[Xiangyu-Hu]

Sorry. I mean not Google test or regression test.