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

Re: 2D incompressible turbulent flow
 

If MAC, SIMPLE, PISO are equally unfamiliar to you, Choose SIMPLE for popularity. MAC requires Catesican grids.

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.

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.

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.

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!