Note: This discussion is about an older version of the COMSOL Multiphysics® software. The information provided may be out of date.
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.
Time dependent solver of unsteady Navier Stokes
Posted May 13, 2014, 12:00 p.m. EDT Fluid & Heat, Computational Fluid Dynamics (CFD), Microfluidics, Studies & Solvers Version 4.1, Version 4.2, Version 4.2a, Version 4.3, Version 4.3a, Version 4.3b 0 Replies
Please login with a confirmed email address before reporting spam
I'm simulating flow of incompressible fluid in periodic media.
I have implemented dimensionless Navier Stokes equations with Comsol PDE module.
1- I resolve my problem with a steady solver (for high Reynolds number which leads to unsteady flow). I get a good solution.
2- I use this steady solution as initial values for my unsteady solver. The problem is that the unsteady solver is giving me a steady solution (for high Re !). The solution is still the same as the steady solver solution.
The unsteady solver : Direct MUMPS solver, Times: range(0,0.002,1), Time stepping method: BDF, Steps taken by solver: Strict, Error estimation: Exclude Algebraic.
Can you advice me please how can I fix this problem ?
Thanks in advance.
Mehrez Agnaou
Hello M A
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.