Difference between revisions of "ET Workshop Fall 2011 RAD"
| Line 3: | Line 3: | ||
** accurate only when mean free path is really short | ** accurate only when mean free path is really short | ||
** almost always implicit to avoid strong CFL limit | ** almost always implicit to avoid strong CFL limit | ||
| + | ** cheap, usually inaccurate | ||
| + | * Flux limited diffusion | ||
| + | ** Diffusion + "trick" at lower optical depths | ||
| + | ** also simple, and has been used for supernovae simulations | ||
| + | ** unclear if working in GR | ||
| + | ** limits radiation speed: ad-hoc | ||
| + | ** also not very accurate | ||
Revision as of 15:43, 2 November 2011
Possibilities
- Diffusion equation
- accurate only when mean free path is really short
- almost always implicit to avoid strong CFL limit
- cheap, usually inaccurate
- Flux limited diffusion
- Diffusion + "trick" at lower optical depths
- also simple, and has been used for supernovae simulations
- unclear if working in GR
- limits radiation speed: ad-hoc
- also not very accurate
