lars davidson chalmers university of technology, goteborg ...lada/3dhill/slides_3dhill.pdf · final...
TRANSCRIPT
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
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
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Final meeting, Brussels, 28-29 Sept, 2004
� ��
� � � �
� � � �
� � � � � � �
Neumann outlet B.C.
�
�DNS data at inlet
3
Final meeting, Brussels, 28-29 Sept, 2004
RA
NS
— EARSM; � � � � ; — 1-eq. SA; � � Low-Re RSM
0 0.5 10
0.2
0.4
0.6
0.8
1
PSfrag replacements
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0 0.5 10
0.2
0.4
0.6
0.8
1
PSfrag replacements��
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0 0.5 10
0.2
0.4
0.6
0.8
1
PSfrag replacements
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0 0.5 10
0.2
0.4
0.6
0.8
1
PSfrag replacements
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0 0.5 10
0.2
0.4
0.6
0.8
1
PSfrag replacements
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� Hybrid LES-RANS and LES
0 0.5 10
0.2
0.4
0.6
0.8
1
PSfrag replacements
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0 0.5 10
0.2
0.4
0.6
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PSfrag replacements
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0 0.5 10
0.2
0.4
0.6
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0.4
0.6
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PSfrag replacements
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0 0.5 10
0.2
0.4
0.6
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1
PSfrag replacements
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4
Final meeting, Brussels, 28-29 Sept, 2004
RA
NS
— EARSM; � � � � ; — 1-eq. SA; � � Low-Re RSM
−0.2 0 0.20
0.2
0.4
0.6
0.8
1
PSfrag replacements
�����
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−0.2 0 0.20
0.2
0.4
0.6
0.8
1
PSfrag replacements
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−0.2 0 0.20
0.2
0.4
0.6
0.8
1
PSfrag replacements
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−0.2 0 0.20
0.2
0.4
0.6
0.8
1
PSfrag replacements
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−0.2 0 0.20
0.2
0.4
0.6
0.8
1
PSfrag replacements
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���������
� Hybrid LES-RANS and LES
−0.2 −0.1 00
0.2
0.4
0.6
0.8
1
PSfrag replacements
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−0.2 −0.1 00
0.2
0.4
0.6
0.8
1
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−0.2 −0.1 00
0.2
0.4
0.6
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PSfrag replacements
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−0.2 −0.1 00
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0.4
0.6
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−0.2 −0.1 00
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0.4
0.6
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PSfrag replacements
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5
Final meeting, Brussels, 28-29 Sept, 2004
0 0.5 1 1.5 2 2.50
0.5
1
PSfrag replacements
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0 0.5 1 1.5 2 2.50
0.5
1PSfrag replacements
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0 0.5 1 1.5 2 2.50
0.5
1
PSfrag replacements
EARSM
�����
0 0.5 1 1.5 2 2.50
0.5
1
PSfrag replacements
1-eq SA
0 0.5 1 1.5 2 2.50
0.5
1
PSfrag replacements
LES-RANS
� �
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LES
6
Final meeting, Brussels, 28-29 Sept, 2004
−2.5 −2 −1.5 −1 −0.5 00
0.5
1
PSfrag replacements
� �� � �� Low-RE RSM � � � �
�����
−2.5 −2 −1.5 −1 −0.5 00
0.5
1
PSfrag replacements
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−2.5 −2 −1.5 −1 −0.5 00
0.5
1
PSfrag replacements
EARSM
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−2.5 −2 −1.5 −1 −0.5 00
0.5
1
PSfrag replacements
1-eq SA
−2.5 −2 −1.5 −1 −0.5 00
0.5
1
PSfrag replacements
LES-RANS
� � �
�����
LES
7
Final meeting, Brussels, 28-29 Sept, 2004
−2.5 −2 −1.5 −1 −0.5 00
0.5
1
PSfrag replacements
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−2.5 −2 −1.5 −1 −0.5 00
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1
PSfrag replacements
EARSM
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−2.5 −2 −1.5 −1 −0.5 00
0.5
1
PSfrag replacements
1-eq SA
−2.5 −2 −1.5 −1 −0.5 00
0.5
1
PSfrag replacements
LES-RANS
� � �
�����
LES
8
Final meeting, Brussels, 28-29 Sept, 2004
−2.5 −2 −1.5 −1 −0.5 00
0.5
1
PSfrag replacements
� �� � �� Low-RE RSM, EARSM � � � � � ��
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−2.5 −2 −1.5 −1 −0.5 00
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1
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0
0.5
1
PSfrag replacements
exp.
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−2.5 −2 −1.5 −1 −0.5 00
0.5
1
PSfrag replacements
1-eq SA
−2.5 −2 −1.5 −1 −0.5 00
0.5
1
PSfrag replacements
LES-RANS
� � �
����� PSfrag replacements
EARSM
LES
9
Final meeting, Brussels, 28-29 Sept, 2004
0 1 2 3−2
−1.5
−1
−0.5
0
0.5
1
1.5
2
PSfrag replacements
Low-RE RSM
����
0 1 2 3−2
−1.5
−1
−0.5
0
0.5
1
1.5
2
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0 1 2 3−2
−1.5
−1
−0.5
0
0.5
1
1.5
2
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EARSM
0 1 2 3−2
−1.5
−1
−0.5
0
0.5
1
1.5
2
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1-eq SA
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0 1 2 3−2
−1.5
−1
−0.5
0
0.5
1
1.5
2
PSfrag replacements
LES-RANS
� �
10
Final meeting, Brussels, 28-29 Sept, 2004
RA
NS
— EARSM; � � � � ; � � Low-Re RSM
0 0.050
0.2
0.4
0.6
0.8
1
PSfrag replacements
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0 0.050
0.2
0.4
0.6
0.8
1
PSfrag replacements
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0 0.050
0.2
0.4
0.6
0.8
1
PSfrag replacements
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0 0.01 0.020
0.2
0.4
0.6
0.8
1
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0 0.01 0.020
0.2
0.4
0.6
0.8
1
PSfrag replacements
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� Hybrid LES-RANS and LES
0 0.050
0.2
0.4
0.6
0.8
1
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0 0.050
0.2
0.4
0.6
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0 0.050
0.2
0.4
0.6
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0 0.01 0.020
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0.4
0.6
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0 0.01 0.020
0.2
0.4
0.6
0.8
1
PSfrag replacements
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11
Final meeting, Brussels, 28-29 Sept, 2004
— EARSM; � � � ; � � Low-Re RSM
−5 0 5−1.5
−1
−0.5
0
0.5
PSfrag replacements
� ���
� �
RANS
−5 0 5−1.5
−1
−0.5
0
0.5
PSfrag replacements
� ��
� �
LES-RANS
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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
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