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Turbulent air flow through curved pipe - no vorticity |
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April 20, 2020, 06:46 |
Turbulent air flow through curved pipe - no vorticity
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New Member
Join Date: Mar 2020
Posts: 18
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Hello everyone,
I am trying to simulate an air flow through a curved pipe (you can find the files here: https://www.dropbox.com/s/ahuf08jhwh...ulent.zip?dl=0). I already did a laminar simulation and it worked fine and returned the expected values. Now I want to do the same simulation with turbulence. It converges, but when I visualize the stream lines in Paraview, they are parallel and laminated just like in the laminar simulation (picture attached). I'd expect some vortices. I already increased the Reynolds-number by increasing the velocity at the inlet to 100 (nu=3*10e-5 and L=1)! Still no turbulence. I refined the mesh and ran the case with 3.5 million points. Still no turbulence. I decreased the convergence criteria to 1e-4. The simulation did not converge (with the fine mesh). Does anyone have an idea what else I could try? I'd appreciate any help. I am using simpleFoam and the turbulence model is RAS (kEpsilon). Thank you Maike |
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Tags |
airflow simulation, kepsilon, simplefoam, turbulence, vortex |
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