Simulations of Solar Convection Zone

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Simulations of Solar Convection Zone

• Nagi N. Mansour

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Goals

• Provide numerical simulation models for
  interpretation of SDO data
• Develop understanding of physical mechanisms in
  the convection zone and links to the atmosphere
• Provide simulation data for testing and
  developing data analyses tools

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Targets

• Solar turbulent convection
• Tachocline
• Upper convective boundary layer
• Supergranulation
• Granulation and wave excitation
• Wave propagation
• Magnetoconvection

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HMI Science Analysis Plan
Data Product
Processing
HMI Data
Science Objective
Tachocline
Global Helioseismology Processing
Internal rotation O(r,T) (0ltrltR)
Meridional Circulation
Filtergrams
Internal sound speed, cs(r,T) (0ltrltR)
Differential Rotation
Near-Surface Shear Layer
Full-disk velocity, v(r,T,F), And sound speed,
cs(r,T,F), Maps (0-30Mm)
Local Helioseismology Processing
Activity Complexes
Active Regions
Carrington synoptic v and cs maps (0-30Mm)
Sunspots
Irradiance Variations
High-resolution v and cs maps (0-30Mm)
Observables
Magnetic Shear
Deep-focus v and cs maps (0-200Mm)
Flare Magnetic Configuration
Flux Emergence
Far-side activity index
Magnetic Carpet
Line-of-Sight Magnetic Field Maps
Coronal energetics
Large-scale Coronal Fields
Vector Magnetic Field Maps
Solar Wind
Coronal magnetic Field Extrapolations
Far-side Activity Evolution
Predicting A-R Emergence
Coronal and Solar wind models
IMF Bs Events
Version 1.0w
Brightness Images
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Approach

• Large-scale 3D simulations
• Fully compressible MHD equations
• Inelastic approximation
• Realistic thermodynamics
• Radiative energy transport
• Data assimilation and Inverse Modeling

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Tools

• Fully compressible MHD equations
• Three-Dimensional code (TVD scheme) with
  realistic equation of state (S. Ustyugov)
• High order finite difference LES code with MHD,
  real gas, radiation and subgrid scale models (A.
  Wray)
• Initiated contact with R. Stein (MSU)

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Tools

• Inelastic approximation
• Slab geometry with SGS model (M. Kirkpatrick)
• Initiated collaboration with
• Colorado Research Ass./UC Boulder/Stanford U./ARC
• Spherical CodeLES

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Resources

• NASA Supercomputing facility
• SGI 1,024-processor Origin 3000
• SGI 512-processor Origin 3000
• SGI 256-processor Origin
• 32-processor Cray SV1e
• SGI and Sun workstations
• 600 terabytes online/nearline data storage
• Stanford SDO/HMI group

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Development plan

• Compressible MHD
• Implement SGS and radiation models into the
  Stein/Nordland code
• Data Assimilation
• Name the Code and make it available as a
  Community code under CCMC (Community Coordinated
  Modeling Center)

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Development plan

• Inelastic Code
• (ASH HYPE) SGS
• Data Assimilation
• Make codes available under CCMC

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Development plan

• Using data to develop understanding/models
• Inverse Modeling

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UiUj
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Collaborations

• Sasha Kosovichev (SDO/HMI) GURU
• Center for Turbulence Research
• Alan Wray
• Michael Rogers
• Sergey Ustyugov
• Robert Stein (MSU)
• Colorado Research Ass.
• M. Miesch
• J. Werne
• T. Lund
• K. Julien ( U. Colorado Boulder)

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Requirements

• Support for the scientific teams
• CS under full cost accounting
• University/Industry science
• Support of High-End Computing by NASA
• Compute cycles
• Formulate IT requirements
• Grid
• Viz. tools
• Analyses tools