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2D incompressible turbulent flow

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Old   May 21, 2005, 05:15
Default 2D incompressible turbulent flow
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na
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Dear for all, I'm going to simulate the steady incompressible turbulent flow arrond an airfoil. There are many Formulations such as : Mac method, Simple, piso...etc. But wath is the best one for these kind of problemes? Thanks for your response in advance
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Old   May 21, 2005, 09:52
Default Re: 2D incompressible turbulent flow
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versi
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If MAC, SIMPLE, PISO are equally unfamiliar to you, Choose SIMPLE for popularity. MAC requires Catesican grids.
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Old   May 22, 2005, 08:59
Default Re: 2D incompressible turbulent flow
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na
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Thanks versi for your response. It is not an equation, that is unfamiliar or no for me. I surch what is the suimple method regarding the other ones. For Mac method is then employed in generalised coordinates.
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Old   May 23, 2005, 04:41
Default Re: 2D incompressible turbulent flow
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Nick
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MAC - is the most simple, SIMPLE - most popular. I've worked on both and if you use a turbulence model (k-e or RSA), i'd suggest using SIMPLE. Have you tried LES or DNS? I've tried Piso, but not much luck, I'm afraid.
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Old   May 23, 2005, 10:28
Default Re: 2D incompressible turbulent flow
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na
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very thanks Nick, Yes, I surch the eseay method. For steady incompressible turbulent flow I'm going to start with k-epsilon model and finaly the LES method.
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Old   June 2, 2005, 11:02
Default Re: 2D incompressible turbulent flow
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General interest
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the physics of 2D turbulence ( e.g. thin films ) is completely different to 3D turbulence. I'd read a little more before going down this investigation route. Your simulations will not capture the inverse cacade of 2D turbuelnce as K-E model assumed dissipation which does not occur in 2D turbulence!

Hope this helps!

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