Setup for grey 3D model grid of Asymptotic Giant Branch stars

• Computational domain: cube
• Gravitation: spherical 1/r potential, smoothed in the center
• Core region: energy source term, velocity damping
• Outer boundaries: open, transmitting for shock waves
• solar composition
• Parameters for model grid (Freytag, Höfner & Liljegren 2017):
  • grey opacities, no dust
  • M_star = 1 M_Sun, M_env = 0.1..0.5 M_Sun,
    L_star = 5000, 7000, 10000 L_Sun,
    281³ or 401³ points, x_box = 1381 or 1970 R_Sun
  • T_eff = 2500..2825 K, logg = -0.5..-1.0,
    R_star = 290..530 R_Sun