Strange results after simulation
Posted: Tue Nov 14, 2017 3:09 pm
Hi,
I tried to run my (steady flow) simulation with a timestep of 0.03, which gave me the results as can be found in attachment (large timestep), with mesh 2 being a (slightly) finer mesh than mesh 1 (being the estimate mesh from SV). Mesh 1 appears to give me a good results when I visualize the velocity at the inlet (parabolic profile). Mesh 2 however does not give me back the parabolic profile at the inlet.
When I chance the timestep to 0.005 (small timestep in attached pictures), mesh 2 appears to give me the correct profile while mesh 1 now looks very bad. For the other parameters I used exactly the same values for four cases.
What can be the problem for this since it looks like SV don't apply my boundary conditions correctly?
Thanks in advance!
Best wishes,
Charlotte
I tried to run my (steady flow) simulation with a timestep of 0.03, which gave me the results as can be found in attachment (large timestep), with mesh 2 being a (slightly) finer mesh than mesh 1 (being the estimate mesh from SV). Mesh 1 appears to give me a good results when I visualize the velocity at the inlet (parabolic profile). Mesh 2 however does not give me back the parabolic profile at the inlet.
When I chance the timestep to 0.005 (small timestep in attached pictures), mesh 2 appears to give me the correct profile while mesh 1 now looks very bad. For the other parameters I used exactly the same values for four cases.
What can be the problem for this since it looks like SV don't apply my boundary conditions correctly?
Thanks in advance!
Best wishes,
Charlotte