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Radiation transport with lightsabers

Radiation transport with lightsabers. Axel Brandenburg (Nordita, Stockholm). Pencil Code. Started in Sept. 2001 with Wolfgang Dobler High order (6 th order in space, 3 rd order in time) Cache & memory efficient MPI, can run PacxMPI (across countries!)

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Radiation transport with lightsabers

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  1. Radiation transportwith lightsabers Axel Brandenburg (Nordita, Stockholm)

  2. PencilCode • Started in Sept. 2001 with Wolfgang Dobler • High order (6th order in space, 3rd order in time) • Cache & memory efficient • MPI, can run PacxMPI (across countries!) • Maintained/developed by ~40 people (SVN) • Automatic validation (over night or any time) • Max resolution so far 10243 , 256 procs • Isotropic turbulence • MHD, passive scl, CR • Stratified layers • Convection, radiation • Shearing box • MRI, dust, interstellar • Self-gravity • Sphere embedded in box • Fully convective stars • geodynamo • Other applications • Homochirality • Spherical coordinates

  3. Online data reduction and visualization non-helically forced turbulence Axel Brandenburg: Lightsabers

  4. Scalars on periphery of the box Axel Brandenburg: Lightsabers

  5. Vorticity and Density See poster by Tobi Heinemann on density wave excitation! Axel Brandenburg: Lightsabers

  6. Volume rendering:Interlockedflux rings Standard routines Don’t work above 5123 meshpoints. Kerr & Brandenburg (1999, Phys. Rev. Lett.) Axel Brandenburg: Lightsabers

  7. Volume rendering • Want to see everything in the volume • Forground should cover background stuff • More than just one field • Different colors… Axel Brandenburg: Lightsabers

  8. Mutual obscuration as with lightsabers Axel Brandenburg: Lightsabers

  9. Intrinsic Calculation Ray direction Transfer equation & parallelization Processors Analytic Solution: Axel Brandenburg: Lightsabers

  10. Analytic Solution: Communication Ray direction The Transfer Equation & Parallelization Processors Axel Brandenburg: Lightsabers

  11. Analytic Solution: Intrinsic Calculation Ray direction The Transfer Equation & Parallelization Processors Axel Brandenburg: Lightsabers

  12. Source function & opacity Axel Brandenburg: Lightsabers

  13. Different colors/frequencies? Axel Brandenburg: Lightsabers

  14. Color table 240 255 16 31 0 15 Axel Brandenburg: Lightsabers

  15. Movie Axel Brandenburg: Lightsabers

  16. Pictures Axel Brandenburg: Lightsabers

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