Sweden, August 28, 2013

A three-day course in "Applied LES, DES and URANS for
Industry" will be given at Chalmers, Gothenburg, Sweden,
between 28-30 August 2013.

Description:

 

The industry has started to introduce time-dependent 

numerical simulation such as large eddy simulation (LES), 

unsteady RANS or hybrid approaches such as DES in their 

development process. The advantage of these techniques is 

much higher accuracy of the prediction compared with steady 

RANS simulations but also possibility to replace costly 

physical testing and simulate flow situations where 

experiments are difficult or impossible. Although most 

commercial (and open source) CFD software have option to run 

unsteady methods, their usage requires knowledge in running 

unsteady simulations which puts different requirements than 

steady RANS on all steps of the process. Being resolving 

techniques, these techniques put higher requirements on all 

steps in the project, from the quality of the computational 

grids, numerical discretization, performing the CFD 

simulation to analysis of large amount of data obtained from 

a time-dependent simulation. 

 

This aim of this course is to equip an engineer or 

researcher with the knowledge to run unsteady CFD 

simulations for the application of his interest. After the 

course, the participant will be able to: 

 

- choose the adequate unsteady technique 

 

- prepare computational grid for that is required for the 

chosen technique 

 

- chose appropriate spatial and temporal discretization and 

other parameters in the simulation 

 

- run the simulation and do appropriate monitoring of the 

results 

 

- postprocessor the results and evaluate the quality of the 

achieved prediction 

 

We will start with 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. 

 

We believe that the course is useful for engineers and 

researcher in all industrial sectors where unsteady flows 

are of importance. The practical example that we will study 

during the course come from vehicle aerodynamics and bluff 

body aerodynamics but the method is by no means limited to 

these two fields. The same methodology can be used in many 

other industrial fields where separated and unsteady flows 

occur. 

 

The course will cover three important applications of CFD 

techniques in industry: prediction using unsteady CFD 

simulations (LES, DES, PANS, URANS), CFD for flow control 

and aerodynamic shape optimization. 

 

More details about the course and the registration can be 

found at  

 

https://www.chalmersprofessional.se/en/programs?tags=industriteknik&id=3178#.UXe0NRSr--M