Case C3.4 DNS and LES of the flow over a 2D periodic hill · D-F-015-01 Dr. Corentin Carton de...
Transcript of Case C3.4 DNS and LES of the flow over a 2D periodic hill · D-F-015-01 Dr. Corentin Carton de...
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Dr. Corentin Carton de WiartSenior Research Engineer
Contact: [email protected]
Case C3.4DNS and LES of the flow over a 2D periodic hill
3rd International Workshop on High-Order CFD Methods
Doc. ref.: PPPPPP-NS-000-00
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Motivation
• Benchmark for wall-bounded turbulent flows, with smooth separation,
recirculation and natural reattachment
• Simple setup: periodic domain, 2D geometry, still close to complexity
of industrial configuration
• Numerical and experimental
results available at wide
range of Reynolds numbers
• Possibility to assess solvers for
DNS, LES, WMLES, RANS-LES,…
• Detailed description, data, references,… on the
Ercoftac QNET-CFD wiki forum / 2D periodic hill
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• Periodic domain in streamwise and spanwise directions
• Body force to provide the correct mass flow rate:
• h
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Geometry and flow conditions
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h
9h4.5h
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Experimental/numerical results available
• Experiments:
• Rapp (2009), Munich
• Re = [5.6, 10.6, 19, 37] x 103
• Incompressible flow
• PIV and LDA agreement
• Periodicity achieved by using 10
successive hills and 18h in span
• CFD:
• Breuer et al. (2009)
• MGLET and LESOCC:
• Finite Volume methods (central)
• Incompressible solvers
• Explicit time-stepping
• DNS and LES up to Re=37k
© 2015 Cenaero – All rights reservedHO Workshop 2015 C3.4
Breuer et al. (2009)
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Summary of the reference CFD
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Re Sim. Ntot/106 Nspan Δt/10-3 Tavg Code
1400 DNS 13.1 200 1.1 1249 LESOCC
1400 DNS 20.0 132 1.5 540 MGLET
2800 DNS 13.1 200 2.0 1249 LESOCC
2800 DNS 48.0 304 1.0 562 MGLET
5600 DNS 13.1 200 2.0 1214 LESOCC
5600 DNS 231.0 404 1.0 343 MGLET
10,595 LES 13.1 200 1.8 1277 LESOCC
10,595 LES 4.1 104 1.0 241 MGLET
37,000 LES 4.1 104 1.0 439 MGLET
DNS
LES
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Mesh generated with IGG, curved with Gmsh
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CGNS Gmsh (2nd order)
128 x 64 x 64 64 x 32 x 32
256 x 128 x 128 128 x 64 x 64
512 x 256 x 256 256 x 128 x 128
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Participants
• Laslo Diosady, and Scott M. Murman, NASA Ames
• Marta de la Llava Plata and Vincent Couailler, Onera
• Daniel J. Garmann and Miguel R. Visbal, US AFRL
• Corentin Carton de Wiart and Koen Hillewaert, Cenaero
• Jonathan Bull and Antony Jameson, Stanford
• Andrea D. Beck, David Flad, Thomas Bolemann, Claus-
Dieter Munz, Stuttgart
• A.F. Antoniadis, Z. Rana, P. Tsoutsanis, D. Drikakis,
Cranfield
© 2015 Cenaero – All rights reservedHO Workshop 2015 C3.4
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Summary of contributions (7 participants, 25 computations)
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Participant Research lab
Code Method/Order
Temporal scheme
Case/Reynolds
DOF
L. Diosady NASA DGM-BR2 DGM-BR2(8)
Space-TimeDG (4th order)
10595 (4) 0.5M – 14M
M. de la Llava Plata ONERA Aghora DGM/SIP(4)
Explicit RK4 2800 (1) 33M
D. Garmann US AFRL FDL3DI Compact FD(6)
Implicit (2nd order)
2800 (3)10595 (3)
0.5M – 33M
C. Carton de Wiart Cenaero Argo DGM
DGM/SIP(4)
Implicit (2nd order)
2800 (2)10595 (2)
14M – 19M
J. Bull Stanford HiFiLES FR – DGM(3 – 5)
Explicit? 2800 (2)10595 (4)
2M – 8M
A. D. Beck IAG Stuttgart
Flexi DGSEM(4 – 10)
Explicit RK4 2800 (2)10595 (3)
0.5M – 8M
A.F. Antoniadis Cranfield - - - - -
Re=10595, were performed using Implicit LES, i.e. without SGS model
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DNS at Reynolds 2800
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DNS Reynolds 2800 – Mean x-velocity
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• MGLET (FVM - 44M)de la Llava Plata (DG4 - 33M)Garmann (FD6 - 4M & 33M)
Carton de Wiart (DG4 – 19M)Bull (DG4 – 8M)Beck (DGSEM10 – 8M)
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DNS Reynolds 2800 – Mean y-velocity
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• MGLET (FVM - 44M)de la Llava Plata (DG4 - 33M)Garmann (FD6 - 4M & 33M)
Carton de Wiart (DG4 – 19M)Bull (DG4 – 8M)Beck (DGSEM10 – 8M)
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DNS Reynolds 2800 – Averaged u’u’ fluctuations
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• MGLET (FVM - 44M)de la Llava Plata (DG4 - 33M)Garmann (FD6 - 4M & 33M)
Carton de Wiart (DG4 – 19M)Bull (DG4 – 8M)Beck (DGSEM10 – 8M)
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DNS Reynolds 2800 – Averaged v’v’ fluctuations
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• MGLET (FVM - 44M)de la Llava Plata (DG4 - 33M)Garmann (FD6 - 4M & 33M)
Carton de Wiart (DG4 – 19M)Bull (DG4 – 8M)Beck (DGSEM10 – 8M)
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DNS Reynolds 2800 – Averaged u’v’ fluctuations
© 2015 Cenaero – All rights reservedHO Workshop 2015 C3.4
• MGLET (FVM - 44M)de la Llava Plata (DG4 - 33M)Garmann (FD6 – 4M & 33M)
Carton de Wiart (DG4 – 19M)Bull (DG4 – 8M)Beck (DGSEM10 – 8M)
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DNS Reynolds 2800 – Averaged Pressure Coefficient
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• MGLET (FVM - 44M)de la Llava Plata (DG4 - 33M)Bull (DG4 – 8M)
Carton de Wiart (DG4 – 19M)Beck (DGSEM10 – 8M)Garmann (FD6 – 4M & 33M)
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DNS Reynolds 2800 – Averaged Pressure Coefficient
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• MGLET (FVM - 44M)de la Llava Plata (DG4 - 33M)Bull (DG4 – 8M)
Carton de Wiart (DG4 – 19M)Beck (DGSEM10 – 8M)Garmann (FD6 – 4M & 33M)
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DNS Reynolds 2800 – Averaged Friction Coefficient
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• MGLET (FVM - 44M)de la Llava Plata (DG4 - 33M)Bull (DG4 – 8M)
Carton de Wiart (DG4 – 19M)Beck (DGSEM10 – 8M)Garmann (FD6 – 4M & 33M)
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LES at Reynolds 10595
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LES Reynolds 10595 – Mean x-velocity
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• ExperimentLESOCC (FVM – 13M)Diosady (DG8 – 4M & DG8 – 14M )Bull (DG4 – 8M)
Garmann (FD6 – 33M)Carton de Wiart (DG4 – 19M)Beck (DGSEM7 – 3M & DGSEM10 – 8M)
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LES Reynolds 10595 – Mean y-velocity
© 2015 Cenaero – All rights reservedHO Workshop 2015 C3.4
• ExperimentLESOCC (FVM – 13M)Diosady (DG8 – 4M & DG8 – 14M )Bull (DG4 – 8M)
Garmann (FD6 – 33M)Carton de Wiart (DG4 – 19M)Beck (DGSEM7 – 3M & DGSEM10 – 8M)
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LES Reynolds 10595 – Averaged u’u’ fluctuations
© 2015 Cenaero – All rights reservedHO Workshop 2015 C3.4
• ExperimentLESOCC (FVM – 13M)Diosady (DG8 – 4M & DG8 – 14M )Bull (DG4 – 8M)
Garmann (FD6 – 33M)Carton de Wiart (DG4 – 19M)Beck (DGSEM7 – 3M & DGSEM10 – 8M)
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LES Reynolds 10595 – Averaged v’v’ fluctuations
© 2015 Cenaero – All rights reservedHO Workshop 2015 C3.4
• ExperimentLESOCC (FVM – 13M)Diosady (DG8 – 4M & DG8 – 14M )Bull (DG4 – 8M)
Garmann (FD6 – 33M)Carton de Wiart (DG4 – 19M)Beck (DGSEM7 – 3M & DGSEM10 – 8M)
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LES Reynolds 10595 – Averaged u’v’ fluctuations
© 2015 Cenaero – All rights reservedHO Workshop 2015 C3.4
• ExperimentLESOCC (FVM – 13M)Diosady (DG8 – 4M & DG8 – 14M )Bull (DG4 – 8M)
Garmann (FD6 – 33M)Carton de Wiart (DG4 – 19M)Beck (DGSEM7 – 3M & DGSEM10 – 8M)
![Page 24: Case C3.4 DNS and LES of the flow over a 2D periodic hill · D-F-015-01 Dr. Corentin Carton de Wiart Senior Research Engineer Contact: corentin.carton@cenaero.be Case C3.4 DNS and](https://reader034.fdocuments.in/reader034/viewer/2022042321/5f0b14337e708231d42ebeaf/html5/thumbnails/24.jpg)
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LES Reynolds 10595 – Averaged Pressure Coefficient
© 2015 Cenaero – All rights reservedHO Workshop 2015 C3.4
• ExperimentLESOCC (FVM – 13M)Diosady (DG8 – 4M & DG8 – 14M )Bull (DG4 – 8M)
Garmann (FD6 – 4M & 33M)Carton de Wiart (DG4 – 19M)Beck (DGSEM7 – 3M & DGSEM10 – 8M)
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LES Reynolds 10595 – Averaged Friction Coefficient
© 2015 Cenaero – All rights reservedHO Workshop 2015 C3.4
• ExperimentLESOCC (FVM – 13M)Diosady (DG8 – 4M & DG8 – 14M )Bull (DG4 – 8M)
Garmann (FD6 – 4M & 33M)Carton de Wiart (DG4 – 19M)Beck (DGSEM7 – 3M & DGSEM10 – 8M)
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Work units / convective time / dof
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0,0001 0,001 0,01 0,1 1
Diosady
de la Llava Plata
Garmann
Carton de Wiart
Bull
Beck8M
33M
33M
19M
8M
14M
GPU
Implicit
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Conclusion
• 2D periodic hill is a very expensive test case… don’t compute the flow
if you know you don’t have enough resources!
• Very good agreement for most participants on the two cases
• Advantages of high-order methods, for both DNS and (I)LES, can be
observed
• Grid/order convergence are now available for DGM and Compact FDM
• Study performed on unstructured meshes with DGM offers the same
accuracy than structured grids
• Define better suited set of boundary conditions for compressible flows:
• Need to set pressure/density/temperature
• Adiabatic vs isothermal walls?
• Source term for the density and energy equations?
© 2015 Cenaero – All rights reservedHO Workshop 2015 C3.4