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September 20, 2007, 00:14 |
Dependency of turbulence model on mesh size
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#1 |
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Hi,
The flow I am trying to simulate is highly swirl in nature. I started with a very coarse mesh without resolving the near wall mesh. I used 4 mm tetra element with T-Grid scheme while the diameter of circular section is 76 mm. What I find, velocity profiles and other results are exactly same for laminar and turbulent models; respectively. The reynolds number would be around 3*10^5 to 5*10^5. I can be assumed a beginner in CFD world. Could you please through some light on importance of mesh size and near wall resolution on turbulence models. I have studied about y+ and wall function but I am wondering if turbulent models might not affect simulations AT ALL even with a coarse mesh and high y+. Should not I see some difference in my solutions. Thanks in advance, KM. |
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