lars davidson chalmers university of technology, goteborg ...lada/3dhill/slides_3dhill.pdf · final...

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Final meeting, Brussels, 28-29 Sept, 2004 3D hill flow, Test Case 26 Lars Davidson Dept. of Thermo and Fluid Dynamics Chalmers University of Technology, G ¨ oteborg, Sweden E-mail [email protected] http://www.tfd.chalmers.se/ lada Presentation at the Flomania Final Review Meeting http://cfd.me.umist.ac.uk/flomania/

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Page 1: Lars Davidson Chalmers University of Technology, Goteborg ...lada/3dhill/slides_3dhill.pdf · Final meeting, Brussels, 28-29 Sept, 2004 3D hill ow , Test Case 26 Lars Davidson Dept

Final meeting, Brussels, 28-29 Sept, 2004

3D hill flow, Test Case 26

Lars Davidson

Dept. of Thermo and Fluid DynamicsChalmers University of Technology, Goteborg, Sweden

E-mail [email protected]://www.tfd.chalmers.se/� lada

Presentation at the Flomania Final Review Meetinghttp://cfd.me.umist.ac.uk/flomania/

1

Page 2: Lars Davidson Chalmers University of Technology, Goteborg ...lada/3dhill/slides_3dhill.pdf · Final meeting, Brussels, 28-29 Sept, 2004 3D hill ow , Test Case 26 Lars Davidson Dept

Final meeting, Brussels, 28-29 Sept, 2004

ICSTM: RANS, low-Re RSM, � � � � �� � �� mesh

FOI: RANS, EARSM, � � � � � � � � � mesh

UMIST: RANS, Wilcox � � , � � � � �� � �� mesh

SPTU: RANS, 1-eq. Spalart-Allmaras, � � � � � � � � � mesh

EDF: LES, � cells (unstructured)

Chalmers: Hybrid LES-RANS, with forcing, � � � �� � � � mesh

2

Page 3: Lars Davidson Chalmers University of Technology, Goteborg ...lada/3dhill/slides_3dhill.pdf · Final meeting, Brussels, 28-29 Sept, 2004 3D hill ow , Test Case 26 Lars Davidson Dept

Final meeting, Brussels, 28-29 Sept, 2004

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3

Page 4: Lars Davidson Chalmers University of Technology, Goteborg ...lada/3dhill/slides_3dhill.pdf · Final meeting, Brussels, 28-29 Sept, 2004 3D hill ow , Test Case 26 Lars Davidson Dept

Final meeting, Brussels, 28-29 Sept, 2004

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Page 5: Lars Davidson Chalmers University of Technology, Goteborg ...lada/3dhill/slides_3dhill.pdf · Final meeting, Brussels, 28-29 Sept, 2004 3D hill ow , Test Case 26 Lars Davidson Dept

Final meeting, Brussels, 28-29 Sept, 2004

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Page 6: Lars Davidson Chalmers University of Technology, Goteborg ...lada/3dhill/slides_3dhill.pdf · Final meeting, Brussels, 28-29 Sept, 2004 3D hill ow , Test Case 26 Lars Davidson Dept

Final meeting, Brussels, 28-29 Sept, 2004

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Page 7: Lars Davidson Chalmers University of Technology, Goteborg ...lada/3dhill/slides_3dhill.pdf · Final meeting, Brussels, 28-29 Sept, 2004 3D hill ow , Test Case 26 Lars Davidson Dept

Final meeting, Brussels, 28-29 Sept, 2004

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Page 8: Lars Davidson Chalmers University of Technology, Goteborg ...lada/3dhill/slides_3dhill.pdf · Final meeting, Brussels, 28-29 Sept, 2004 3D hill ow , Test Case 26 Lars Davidson Dept

Final meeting, Brussels, 28-29 Sept, 2004

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Page 9: Lars Davidson Chalmers University of Technology, Goteborg ...lada/3dhill/slides_3dhill.pdf · Final meeting, Brussels, 28-29 Sept, 2004 3D hill ow , Test Case 26 Lars Davidson Dept

Final meeting, Brussels, 28-29 Sept, 2004

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Page 10: Lars Davidson Chalmers University of Technology, Goteborg ...lada/3dhill/slides_3dhill.pdf · Final meeting, Brussels, 28-29 Sept, 2004 3D hill ow , Test Case 26 Lars Davidson Dept

Final meeting, Brussels, 28-29 Sept, 2004

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Page 11: Lars Davidson Chalmers University of Technology, Goteborg ...lada/3dhill/slides_3dhill.pdf · Final meeting, Brussels, 28-29 Sept, 2004 3D hill ow , Test Case 26 Lars Davidson Dept

Final meeting, Brussels, 28-29 Sept, 2004

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Page 12: Lars Davidson Chalmers University of Technology, Goteborg ...lada/3dhill/slides_3dhill.pdf · Final meeting, Brussels, 28-29 Sept, 2004 3D hill ow , Test Case 26 Lars Davidson Dept

Final meeting, Brussels, 28-29 Sept, 2004

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Page 13: Lars Davidson Chalmers University of Technology, Goteborg ...lada/3dhill/slides_3dhill.pdf · Final meeting, Brussels, 28-29 Sept, 2004 3D hill ow , Test Case 26 Lars Davidson Dept

Final meeting, Brussels, 28-29 Sept, 2004

SUMMARY

� All RANS models give a completely incorrect flow field

� LES and hybrid LES-RANS in good agreement with expts.

� However, it seems that the LES/LES-RANS predictions fail tocapture a recirculation region near the crest of the hill.

� Mesh sizesRANS � � � �� � million (half of the domain)LES � � millionHybrid LES-RANS �� � million

� CPU timesRANS, EARSM � � � days 1-CPU DEC-AlphaRANS, RSM � hours 4-CPU P4RANS SA 1-eq � �� � 2-CPU P3, 1000 MHzLES � weeks 1-CPU, Fujitsu VPP5000LES-RANS � week (10+10 through flows) 1-CPU Opteron 244

13