Stanford ASC Center

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Stanford ASC Center Stanford/SNL
Collaboration Parviz Moin Sheldon
Tieszen
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CITS Research Areas
CDP
TFLO2000
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CDP general purpose LES solver

• Unstructured polyhedral meshes
• Fortran 90/MPI
• FV discretization of filtered variable density NS
  equations
• Dynamic SGS closures
• Steady flamelet/progress variable combustion
• Lagrangian point particle/parcel tracking for
  sprays
• Levelset modeling for multiphase flows
• Code transferred to LANL and LLNL

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Collaborations with the Labs
Buoyancy driven instabilities - CDP for modeling
plumes (Stanford/SNL) Tsunami modeling - CDP
for Canary Island Tsunami Scenarios (Stanford/LAN
L) LES Technology - Complex Vehicle Aerodynamics
using CDP (Stanford/LLNL) Parallel I/O
Large-Scale Data Visualization - UDM integrated
in CDP (Stanford/LANL) Parallel Global Solvers
- HyPre Library integrated in CDP (Stanford/LLNL)
Parallel Grid Generation - Cubit and related
libraries (Stanford/SNL) Merrimac - Streaming
Supercomputer Prototype (Stanford/LLNL/LBNL/NASA)
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Stanford/SNL Collaboration
SNL Fire Science and Technology Group Sheldon
Tieszen Greg Evans

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Stanford/SNL Collaboration

In 1998 RANS modeling of natural convection heat
transfer
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Stanford/SNL Collaboration

In 1998 RANS modeling of natural convection heat
transfer
In 2002 steady and unsteady modeling of
buoyancy-driven heat transfer
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Stanford/SNL Collaboration

In 1998 RANS modeling of natural convection heat
transfer
In 2002 steady and unsteady modeling of
buoyancy-driven heat transfer
In 2004 LES simulations and development of SGS
models for buoyant plumes
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CDP - Unstructured grid LES/DNS
Side view of the simulated plume
Top view of the fire pool grid
2m
Density contours
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Instabilities driving the mixing
RT bubbles and spikes
2m
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CDP - Unstructured grid LES/DNS
Overnight CDP turnaround on ALC.
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Significance for Stanford
Demonstration of the use of CDP technology in
broad application areas Validation exercise
(strong interaction between experimentalists and
modelers) Good test for several algorithms
developed in CDP variable density formulation,
low dissipation numerics, unstructured
grids Opportunity for physical model development
(closures for the buoyancy terms in LES and
RANS) Comparison between CFD technology in FUEGO
(SNL Code) and CDP
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Tsunami modeling (with LANL)
Stanford calculations
Stanford calculations
Ward Day, Geophysical J. (2001)
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Vehicle Aerodynamics (with LLNL)