I am simulating a gas displacing a viscous fluid in a cylinder using COMSOL. The flow is plane symmetric with low Reynolds number. I am applying flow rate as inlet while zero pressure at the outlet, but the equations can not be converged and results in inconsistent initial guess. I have uploaded my model in the attached file. Thank you.
Which is the Re number at the inlet?
The moving mesh physics is quite hard to make it converged, have tried to use the LS one?
Reading the guide of the COMSOL maybe help:
https://www.comsol.com/multiphysics/navier-stokes-equations
@Luigi Candido, thank you. The Reynolds number is 0.15 at the inlet and therefore the inertial term has been neglected. Is it possible for you to change the inlet and outlet boundary conditions and converge the equations?.
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