subsection Material model
  set Model name = ascii reference profile
  set Material averaging = harmonic average

  subsection Ascii data model
    set Data file name = isentrope_properties.txt
    set Data directory = $ASPECT_SOURCE_DIR/data/adiabatic-conditions/ascii-data/
  end

  subsection Ascii reference profile
    set Thermal viscosity exponent = 10.0
    set Viscosity prefactors = 1.0, 0.1, 1.0, 10.0
  end
end
