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fixed bug in initialization of T_c for dimensional anelastic #445

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fixed bug in initialization of T_c for dimensional anelastic #445

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14 changes: 8 additions & 6 deletions src/Physics/PDE_Coefficients.F90
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Original file line number Diff line number Diff line change
Expand Up @@ -521,7 +521,7 @@ Subroutine Polytropic_Reference()
Integer :: i
Real*8 :: zeta_0, c0, c1, d
Real*8 :: rho_c, P_c, T_c,denom
Real*8 :: thermo_gamma, volume_specific_heat
Real*8 :: thermo_gamma, volume_specific_heat, gas_constant
Real*8 :: beta
Real*8 :: Gravitational_Constant = 6.67d-8 ! cgs units
Real*8, Allocatable :: zeta(:), gravity(:)
Expand Down Expand Up @@ -583,16 +583,17 @@ Subroutine Polytropic_Reference()
denom = (poly_n+1.d0) * d * c1
P_c = Gravitational_Constant * poly_mass * rho_c / denom

T_c = (poly_n+1.d0) * P_c / (Pressure_Specific_Heat * rho_c)
! The following is needed to calculate T_c from the ideal gas law,
! as well as the entropy gradient.
! This assumes a monatomic ideal gas with three translational degrees of freedom
thermo_gamma = 5.0d0/3.0d0
gas_constant = (thermo_gamma - 1.0d0)*Pressure_Specific_Heat/thermo_gamma
T_c = P_c / (gas_constant * rho_c)

!-----------------------------------------------------------
! Initialize reference structure
Gravity = Gravitational_Constant * poly_mass / Radius**2

! The following is needed to calculate the entropy gradient
thermo_gamma = 5.0d0/3.0d0
volume_specific_heat = pressure_specific_heat / thermo_gamma

Ref%Density = rho_c * zeta**poly_n

Ref%dlnrho = - poly_n * c1 * d / (zeta * Radius**2)
Expand All @@ -601,6 +602,7 @@ Subroutine Polytropic_Reference()
Ref%Temperature = T_c * zeta
Ref%dlnT = -(c1*d/Radius**2)/zeta

volume_specific_heat = pressure_specific_heat / thermo_gamma
Ref%dsdr = volume_specific_heat * (Ref%dlnT - (thermo_gamma - 1.0d0) * Ref%dlnrho)

Ref%Buoyancy_Coeff = gravity/Pressure_Specific_Heat*ref%density
Expand Down