Radiation transport with lightsabers Axel Brandenburg Lightsabers Axel
Radiation transport with lightsabers Axel Brandenburg: 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 Pacx. MPI (across countries!) Maintained/developed by ~40 people (SVN) Automatic validation (over night or any time) Max resolution so far 10243 , 256 procs • Isotropic turbulence – • Stratified layers – • MRI, dust, interstellar Self-gravity Sphere embedded in box – – • Convection, radiation Shearing box – – • MHD, passive scl, CR Fully convective stars geodynamo Other applications – – Homochirality Spherical coordinates
Online data reduction and visualization non-helically forced turbulence Axel Brandenburg: Lightsabers 3
Scalars on periphery of the box Axel Brandenburg: Lightsabers 4
Vorticity and Density See poster by Tobi Heinemann on density wave excitation! Axel Brandenburg: Lightsabers 5
Volume rendering: Interlocked flux rings Standard routines Don’t work above 5123 meshpoints. Kerr & Brandenburg (1999, Phys. Rev. Lett. ) Axel Brandenburg: Lightsabers 6
Volume rendering • • Want to see everything in the volume Forground should cover background stuff More than just one field Different colors… Axel Brandenburg: Lightsabers 7
Mutual obscuration as with lightsabers Axel Brandenburg: Lightsabers 8
Transfer equation & parallelization Processors Analytic Solution: Intrinsic Calculation Axel Brandenburg: Lightsabers Ray direction 9
The Transfer Equation & Parallelization Processors Analytic Solution: Communication Axel Brandenburg: Lightsabers Ray direction 10
The Transfer Equation & Parallelization Processors Analytic Solution: Intrinsic Calculation Axel Brandenburg: Lightsabers Ray direction 11
Source function & opacity Axel Brandenburg: Lightsabers 12
Different colors/frequencies? Axel Brandenburg: Lightsabers 13
Color table 240 255 16 31 0 Axel Brandenburg: Lightsabers 15 14
Movie Axel Brandenburg: Lightsabers 15
Pictures Axel Brandenburg: Lightsabers 16
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