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Time dependent solver of unsteady Navier Stokes
Posted 13 mag 2014, 12:00 GMT-4 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
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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
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