Lothars Scratch

Alexanders Setups

lin_T-Grad

init.c: InitDomain()

• lineares \(T\)-Profil gemäß IC_Temperature_X2BEG_K> IC_Temperature_X2END_K
• ideales Gas: isotherme Kompressibilität = \(1/P \Rightarrow \tilde c^2=P/\rho=k_BT/m\)
• Druck-DGL \(-\partial_y p=-pg/\tilde c^2(T) \Rightarrow\) Druckprofil (numerisch) mit RB \(P(y_\text{min})=10^9\)bar
• Dichteprofil aus \(\rho=P/\tilde c^2(T)\), beide Profile ggf. von unten gedeckelt durch RHO_min aus Restrictions.conf
• \(v_y\) gestört durch Sinus mit Wellenlänge = Systembreite × IC_Perturbation_Nmodes und Amplitude IC_Perturbation_Amplitude_cs × \(\exp(-\vert y_\text{rel}-1/2\vert)\)

pluto.ini

• Grid = [0.0,0.1] x [1.0,1.1]
• Boundary = [periodic,periodic] x [reflective,userdef]
• Anfangswerte:

 IC_Temperature_X2BEG_K          1e+6
 IC_Temperature_X2END_K          1e+5
 IC_Perturbation_Nmodes          +5.0
 IC_Perturbation_Amplitude_cs    +0.3

bodyforce.c

konstante Beschleunigung in \(-y\)-Richtung:

 g[JDIR] = - G_GravityConstant * SolarMass / (SolarRadius*SolarRadius);

makefile_user_simulationdefs

 DIMENSIONS              = 2
 GEOMETRY                = CARTESIAN
 BODY_FORCE              = VECTOR
 EOS                     = IDEAL

user_defined_parameters.h

 UNIT_DENSITY                    (1e-0)
 UNIT_LENGTH                     (CONST_Rsun)
 UNIT_VELOCITY                   (CONST_Rsun * CONST_c / CONST_ly)
 
 IC_Temperature_X2BEG_K      
 IC_Temperature_X2END_K      
 IC_Perturbation_Nmodes      
 IC_Perturbation_Amplitude_cs