Setup for 2D "Cepheid" model
- Rectangular computational domain:
(small) part of the stellar surface,
effects of surface curvature and variation of gravity ignored,
side length: 11x5.5 Gm, 5002 points
- Parameters: logg=2,
Teff = 5300K,
solar composition
- Lower boundary:
prescribed energy flux enters as radiation,
closed for matter
- Side boundaries:
periodic
- Top boundary:
closed for matter, transmitting for radiation.
Horizontal distance between downdrafts
- Birth rate, growth rate, horizontal speed (merging of downdrafts)
- Downdrafts that are "eaten" young enhance the "predator".
- Downdrafts that manage to grow weaken the other ones.