Sweden, August 29, 2012

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. Second part of the course will
introduce recent development in aerodynamic shape
optimization. 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.

Description:

 

There is large number of vehicle flows where time-dependent 

simulations are the only way of analyzing the problem 

because experimental  techniques cannot provide realistic 

flow. Examples are influence of wind gusts on vehicles or 

overtaking and passage of vehicles.  Another trend in 

vehicle aerodynamics is that CFD is not only used for 

prediction and explanation of flows but also for improvement 

of aerodynamic performance of vehicles. This is done using 

shape optimization and/or flow control. Both these 

techniques are being introduced in industry and they require 

that  the CFD engineer has knowledge in application of these 

techniques. 

 

The idea behind this course is to transfer the knowledge an 

the experience in these CFD techniques for vehicle 

aerodynamics from our research group (Vehicle Aerodynamics 

Laboratory, www.tfd.chalmers.se/~sinisa) to other 

researchers and industrial users.  

 

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 

such as: 

 

    * 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 

tunnels.                       

 

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. 

 

Registration 

 

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).