Turbulence is one of the last remaining challenges in the 
simulation of fluid flows. Although RANS (Reynolds-
Averaged Navier Stokes) turbulence models are still very 
widely used, these approaches are being slowly supplanted 
by Large Eddy Simulation (LES). However, LES is 
prohibitively expensive for the industrial simulation of 
wall-bounded flows, especially at high Reynolds number. As 
a result, a family of Hybrid RANS-LES techniques, of which 
Detached Eddy Simulation (DES) is one member, are being 
increasingly used for the modelling of flow in and around 
complex geometries. Due to the current lack of readily-
available expert guidance on the application of Hybrid 
RANS-LES techniques, and the emergence of DES as the tool 
of the trade, ERCOFTAC has drawn upon its worldwide 
network of academic and industrial experts to provide a 
training course aimed at an industrial CFD audience and 
relevant to a wide range of industry sectors including: 
Aerospace, automotive, chemical and process, civil and 
built environment, power generation and the wider 
engineering community. Specifically, this course aims to 
provide: 

An overview of turbulence modelling.  
A firm foundation in the theory and ideas underlying, 
RANS, LES and Hybrid RANS-LES techniques.  
Recommendation and guidance for the appropriate and 
effective application of Hybrid RANS-LES. Examples from 
real-world engineering simulations, using the DES class of 
models.