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na May 21, 2005 05:15

2D incompressible turbulent flow
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

versi May 21, 2005 09:52

Re: 2D incompressible turbulent flow
If MAC, SIMPLE, PISO are equally unfamiliar to you, Choose SIMPLE for popularity. MAC requires Catesican grids.

na May 22, 2005 08:59

Re: 2D incompressible turbulent flow
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.

Nick May 23, 2005 04:41

Re: 2D incompressible turbulent flow
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.

na May 23, 2005 10:28

Re: 2D incompressible turbulent flow
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.

General interest June 2, 2005 11:02

Re: 2D incompressible turbulent flow
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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