Hi,
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
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