turbulence model problem
 

hi
i am mechancial engineering student i am using ansys 12.0 fluent
the problem is that, i want to model turbulent flow and investigate turbulent effect over NACA 4412 but dont know what turbulent model i should use ?
i need urgent help

In Fluent help you'll get a very comprehensive explanation about which turbulence model is better for which case.
But I'll use a Standard k-epsilon model in that case.