Local simulations

• Radiation hydrodynamics:
  computational box covers small part of stellar surface
  and contains only a small number of granules
• See Nordlund, Stein, Dravins
• E.g. "2D model of solar chromosphere (temperature)"
  by Sven Wedemeyer, Matthias Steffen, Hans-Günter Ludwig, Hartmut Holweger, Bernd Freytag
• Done for solar-type and other main-sequence stars,
  red giants and cool white dwarfs