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CFD Events Calendar, Event Record #28162

Course on advanced turbulence and transition modelling: RANS, LES and laminar-to-turbulent transition models
The course introduces several advanced turbulence modeling topics. First one refers to the strengths and limitations of the RANS modeling. This is followed by the discussion of the Large Eddy Simulation (LES) with strong focus on the evaluation of the quality of the results. Finally, the laminar-to-turbulent transition models (including those present in the commercial solvers) are discussed. As a bonus, the lattice Boltzmann method with the implicit-LES model is introduced.
Date: June 27, 2019 - June 28, 2019
Location: Rektorska 4, Warsaw, mazowieckie, Poland
Web Page:
Contact Email:
Organizer: QuickerSim Ltd
Special Fields: Turbulence Modeling, Turbulence Theory, Turbulence - LES Methods, Incompressible Flows, Theoretical Fluid Dynamics, Transition, Lattice-Boltzmann Methods, Turbulence - DNS Simulations, Turbulence - RANS Methods
Softwares: QuickerSim CFD Toolbox
Type of Event: Course, International

This 2-day course is intended for engineers whose work 
concerns CFD modelling of turbulent flows and convective 
heat transfer. The course aims to imbue the participants 
with a thorough understanding of eddy-viscosity based 
RANS models, RANS-based laminar-to-turbulent transition 
models, and LES approaches. A detailed explanation of 
RANS-based techniques will be given with emphasis on the 
interpretation of the results. Limitations and advantages 
of RANS-based strategies will be discussed. An 
explanation of the influence of inlet boundary conditions 
for modelled scalars will be provided; cases in which 
RANS models exhibit a strong sensitivity to the 
prescribed inlet values of the modelled variables will be 

The second part of the course is meant to address the 
deficiencies of RANS models. Examples of applications of 
the Large Eddy Simulation (implicit LES or quasi-Direct 
Numerical Simulation, DNS) and the increasingly popular 
lattice Boltzmann methods will be given. We will provide 
the theoretical background and discuss applications of 
LES for massively separated flows, where the use of 
standard RANS models might lead to significant errors. We 
will teach how to evaluate the quality of a LES solution 
using two-point and autocorrelations and how to estimate 
the required mesh cell and time step sizes to resolve the 
turbulence statistics with sufficient accuracy.

The last part of the course will focus on modelling the 
laminar-to-turbulent transition of a flow. We will 
explain the physics of natural, bypass, and separated 
flow transitions and describe the most popular transition 
models (available in many commercial CFD packages). 
Finally, we will show and discuss the results of 
transition simulations and compare them with experiments, 
DNS, and results obtained using fully-turbulent RANS 

The lectures will consist of theoretical background on 
each of the topics and will be illustrated with 
simulation results. Limitations and advantages of various 
turbulence modelling and convective heat transfer 
modelling strategies will be discussed. It will be 
demonstrated how to overcome or mitigate turbulent flow 
and heat transfer modelling errors by proper selection of 
closure strategies.

The lecturer of the course is Dr Sławomir Kubacki (Dr-
habil.), a former co-worker of Dr Florian Menter, and an 
author of the laminar-to-turbulent transition models for 
turbomachniery flows.
Event record first posted on May 2, 2019, last modified on May 2, 2019

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