############### Parameters describing the model

subsection Geometry model
  set Model name = spherical shell

  subsection Spherical shell
    set Inner radius  = 1.22
    set Opening angle = 360
    set Outer radius  = 2.22
  end
end

# [...]

subsection Material model
  set Model name = simple

  subsection Simple model
    set Reference density             = 1
    set Reference specific heat       = 1.
    set Reference temperature         = 0
    set Thermal conductivity          = 1
    set Thermal expansion coefficient = 1e-6
    set Viscosity                     = 1
  end
end

############### Parameters describing the temperature field
# Angular mode is set to 4 in order to match the number of
# convective cells reported by Davies et al.

subsection Initial temperature model
  set Model name = spherical hexagonal perturbation

  subsection Spherical hexagonal perturbation
    set Angular mode          = 4
    set Rotation offset       = 0
  end
end

############### Prescribe the Rayleigh number as g*alpha
# Here, Ra = 10^4 and alpha was chosen as 10^-6 above.
subsection Gravity model
  set Model name = radial constant

  subsection Radial constant
    set Magnitude =  1e10
  end
end

# [...]
