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© 2010 Icon Technology & Process Consulting Ltd. All rights reserved.<br />
Validation of Numerical Methods<br />
in<br />
Defrost Simulations<br />
Technology Process Consulting<br />
www.iconCFD.com<br />
MSc Tobias Völker | t.voelker@iconcfd.com<br />
Dr. Ries Bouwman | r.bouwman@iconcfd.com<br />
5th OpenFOAM® Workshop, Gothenburg<br />
OpenFOAM is a registered trade mark of OpenCFD® Limited<br />
ICON | www.iconCFD.com | Delivering Independent and Confidential Support and Expertise since 1992
Contents<br />
© 2010 Icon Technology & Process Consulting Ltd. All rights reserved.<br />
Introduction to<br />
--<br />
Icon Open Source CFD<br />
--<br />
MGLET CFD<br />
Meshing<br />
Modelling<br />
--<br />
LES<br />
--<br />
RANS<br />
Experiments<br />
Comparison and Conclusions<br />
Open Source CFD International Conference<br />
ICON | www.iconCFD.com | Delivering Independent and Confidential Support and Expertise since 1992
© 2010 Icon Technology & Process Consulting Ltd. All rights reserved.<br />
Icon Worldwide<br />
ICON | www.iconCFD.com | Delivering Independent and Confidential Support and Expertise since 1992
© 2010 Icon Technology & Process Consulting Ltd. All rights reserved.<br />
International Customers<br />
ICON | www.iconCFD.com | Delivering Independent and Confidential Support and Expertise since 1992
MGLET CFD<br />
© 2010 Icon Technology & Process Consulting Ltd. All rights reserved.<br />
Tool was developed in 1980 by<br />
--<br />
University of German Armed Forces (Neubiberg)<br />
--<br />
Technical University of Munich<br />
Programming language is Fortran 77 and Fortran 90<br />
Mesh generator for block structured, cartesian volume meshes<br />
Solver for DNS and LES simulations<br />
--<br />
Smagorinsky turbulence modell<br />
Fully parallelised and works with multigrid method<br />
ICON | www.iconCFD.com | Delivering Independent and Confidential Support and Expertise since 1992
Icon Open Source CFD<br />
© 2010 Icon Technology & Process Consulting Ltd. All rights reserved.<br />
Why Open Source<br />
--<br />
Reducing Total Cost of Ownership (TCO) of CFD process<br />
--<br />
Scalable, robust, long-term solutions<br />
--<br />
Cutting edge technology for improved accuracy<br />
--<br />
Customisability<br />
Since Icon are committed to providing the best solutions for customer<br />
requirements, this increasingly means Open Source software.<br />
ICON | www.iconCFD.com | Delivering Independent and Confidential Support and Expertise since 1992
© 2010 Icon Technology & Process Consulting Ltd. All rights reserved.<br />
FOAMpro is ICON’s customised<br />
CFD service package based on<br />
open source technology<br />
Four main components:<br />
--<br />
Advanced hex-dominant<br />
parallel meshing without<br />
license limitations<br />
--<br />
Enhanced solution and<br />
analysis routines without<br />
license limitations<br />
--<br />
First class user support<br />
--<br />
Graphical user interface for<br />
simple case set-up<br />
Graphical<br />
User<br />
Interface<br />
Advanced<br />
Parallel<br />
Meshing<br />
Technical<br />
Support<br />
Enhanced<br />
Solvers<br />
ICON | www.iconCFD.com | Delivering Independent and Confidential Support and Expertise since 1992
© 2010 Icon Technology & Process Consulting Ltd. All rights reserved.<br />
ICON | www.iconCFD.com | Delivering Independent and Confidential Support and Expertise since 1992
Meshing<br />
© 2010 Icon Technology & Process Consulting Ltd. All rights reserved.<br />
MGLET<br />
--<br />
CAD surface input<br />
--<br />
Structured<br />
--<br />
No prism layers, strong local refinement<br />
needed<br />
Icon Open Source CFD<br />
--<br />
STL surface input<br />
--<br />
Hex-dominant<br />
--<br />
Prism layers, feature line capturing<br />
~80 million cells<br />
~30 million cells<br />
ICON | www.iconCFD.com | Delivering Independent and Confidential Support and Expertise since 1992
Modelling MGLET<br />
© 2010 Icon Technology & Process Consulting Ltd. All rights reserved.<br />
LES<br />
--<br />
Time intensive<br />
--<br />
Visualisation of turbulent<br />
eddies and structures<br />
va lue [m/s]<br />
1,70<br />
1,65<br />
1,60<br />
1,55<br />
1,50<br />
1,45<br />
Integral value of velo ci ties<br />
1,40<br />
1,35<br />
1,30<br />
4005 00 6007 00 800 900 1000 1100 1200 1300 1400<br />
time [ms ]<br />
ICON | www.iconCFD.com | Delivering Independent and Confidential Support and Expertise since 1992
Modelling Icon Open Source CFD<br />
© 2010 Icon Technology & Process Consulting Ltd. All rights reserved.<br />
RANS<br />
--<br />
Efficient<br />
--<br />
No visualisation of<br />
turbulent eddies and<br />
structures<br />
ICON | www.iconCFD.com | Delivering Independent and Confidential Support and Expertise since 1992
Coupling with AURA<br />
© 2010 Icon Technology & Process Consulting Ltd. All rights reserved.<br />
Heat conduction and radiation<br />
De-icing<br />
Transient<br />
LES and RANS<br />
ICON | www.iconCFD.com | Delivering Independent and Confidential Support and Expertise since 1992
© 2010 Icon Technology & Process Consulting Ltd. All rights reserved.<br />
Experiment vs LES<br />
ICON | www.iconCFD.com | Delivering Independent and Confidential Support and Expertise since 1992
© 2010 Icon Technology & Process Consulting Ltd. All rights reserved.<br />
Experiment vs RANS<br />
ICON | www.iconCFD.com | Delivering Independent and Confidential Support and Expertise since 1992
© 2010 Icon Technology & Process Consulting Ltd. All rights reserved.<br />
LES vs RANS<br />
ICON | www.iconCFD.com | Delivering Independent and Confidential Support and Expertise since 1992
Conclusions<br />
© 2010 Icon Technology & Process Consulting Ltd. All rights reserved.<br />
LES<br />
--<br />
Time intensive<br />
--<br />
Visualisation of turbulent eddies and structures<br />
--<br />
Differences on passenger side<br />
RANS<br />
--<br />
Fast and very efficient for steady state simulations<br />
--<br />
Similar differences on passenger side<br />
--<br />
No visualisation of time dependent events<br />
ICON | www.iconCFD.com | Delivering Independent and Confidential Support and Expertise since 1992
© 2010 Icon Technology & Process Consulting Ltd. All rights reserved.<br />
www.opensourceCFD.com<br />
4-5 November 2010, Munich<br />
ICON | www.iconCFD.com | Delivering Independent and Confidential Support and Expertise since 1992
© 2010 Icon Technology & Process Consulting Ltd. All rights reserved.<br />
The contents of this archive is supplied in confidence, and commercial security on<br />
its contents must be maintained. It must not be used for any purpose other than for<br />
which it is supplied, nor may any information be disclosed to unauthorised persons.<br />
It must not be reproduced in whole or in part without permission in writing from Icon.<br />
Icon acknowledges the support of the VW Group<br />
Technology Process Consulting<br />
www.iconCFD.com<br />
© 1992 - 2010 Icon Technology & Process Consulting Ltd. All rights Reserved<br />
www.iconCFD.com<br />
www.opensourceCFD.com<br />
ICON | www.iconCFD.com | Delivering Independent and Confidential Support and Expertise since 1992
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