The course will give an introduction in how time-dependent
techniques such as Large-Eddy Simulations (LES),
Detached-Eddy Simulations (DES), Partially-Averaged
Navies-Stokes (PANS) and unsteady RANS (URANS) can be used
in vehicle aerodynamics. We will discuss differences between
these techniques and give best practical guidelines for
usage of each technique. We will show when each of the
techniques could/should be used and how to use it. Questions
* How to make an appropriate computational grid?
* What is the appropriate numerical scheme?
* How to initiate a simulation, run it, average and
analyze the results of the simulation?
will be discussed.
After an introduction to these techniques, we will show how
these techniques can be used for prediction of different
aspects of vehicle aerodynamics flows. One important aspect
of prediction of flows will be directional stability. We
will show how these time-dependent techniques can be used to
study flows around vehicles influenced not only to constant
crosswinds but also wind gusts. We will present several
different techniques for simulating flows under influence of
atmospheric wind gusts. Beside the atmospheric wind gusts,
participants will learn how to study influence of vehicles
passing other vehicles or other objects such as platforms or
Second part of the course will introduce recent development
in aerodynamic shape optimization. Here we will present
several different ways for multi-objective aerodynamic shape
optimization of vehicles. Both optimization using surrogate
models and automatic optimization algorithms will be discussed.
The third part of the course will discuss flow control and
how time-dependent CFD approaches can be used to improve
aerodynamic performance of vehicles. Both passive and active
flow control will be discussed and participants will learn
how CFD can be most efficiently used to introduce and
optimize flow control devices.
Course fee:The price is 20,000 SEK (excl. VAT) which
includes course material, lunches, course dinner, and coffee.
For PhD students the fee is reduced to 15,000 SEK (excl. VAT).
The lecturer at the course (both during lectures and
workshops) will be Prof. Sinisa Krajnovic from the Division
of Fluid Dynamics, Dept of Applied Mechanics, Chalmers
University of Technology.
Professor Krajnovic pioneered the use of Large Eddy
Simulation (LES) technique for the study of vehicle
aerodynamics flows. He has written widely on application of
unsteady simulations such as LES and hybrid approaches (such
as Detached Eddy Simulation (DES) and Partially-Averaged
Navier Stokes (PANS)) in aerodynamics of road vehicles and
trains. His current interests include: prediction of
aerodynamics flows, development of hybrid numerical
approaches (such as PANS), vehicle aerodynamic shape
optimization and flow control for vehicles.
Prof. Krajnovic is head of Vehicle Aerodynamic Laboratory
at Chalmers. Established in 2009, Vehicle Aerodynamic
Laboratory is devoted to fundamental and applied numerical
research in vehicle aerodynamics. Education of a new
generation CFD engineers and researches in vehicle
aerodynamics is the core of Vehicle Aerodynamic Laboratory.
Most aspects of ground vehicles aerodynamics using unsteady
CFD simulations were for the first time studied by Prof.
Krajnovic and his co-workers. Examples of publications
produced during more than 15 years of his research activity
in the field can be found at http://www.tfd.chalmers.se/~sinisa/