Due to the low viscosity of most technical fluids, almost 
all industrial flows are turbulent. While the turbulent 
fluctuations can, in principle, be computed by a direct 
numerical simulation (DNS) of the Navier-Stokes equations, 
this is hardly feasible at realistic Reynolds numbers. The 
resolution requirements in the time and space domain would 
be prohibitive and exceed available computing power by many 
orders of magnitude. Even large eddy simulation (LES) is 
applicable only at relatively low Reynolds numbers and 
flows away from solid walls. Therefore, the predictive 
accuracy of today’s CFD simulations is critically dependent 
on the choice of turbulence model and proper usage. 

This course is tought by Dr. Florian Menter, an expert in 
the field. It addresses turbulence modeling for the CFD 
practitioner. It provides an introduction to the physics of 
turbulent flows and the effects of turbulence on 
engineering problems. The main classes of turbulence models 
are introduced and described in detail, emphasizing a 
practical perspective. The model section covers well-known 
eddy-viscosity models like the k-e model, the k-w model and 
the SST model as well as popular one-equation models. More 
complex formulations based on the Reynolds stress equations 
are discussed. Augmentations to turbulence models for 
swirling flows, stagnation flows and flows dominated by 
flow reattachment are presented. 

An important part of the course is the discussion of the 
wall treatment of turbulence models and the associated grid 
resolution requirements for successful CFD simulations. 
Examples comprise classical aerodynamic flows and flows 
with heat transfer. The last part of the course addresses 
unsteady flow simulations, based on unsteady RANS, detached 
eddy simulation, large eddy simulation and a new concept 
developed by ANSYS CFX termed scale-adaptive simulation.