|  | 
| double precision | tkelvi | 
|  | Temperature in Kelvin correponding to 0 degrees Celsius (= +273,15)  More... 
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| double precision | tkelvn | 
|  | Temperature in degrees Celsius corresponding to 0 Kelvin (= -273,15)  More... 
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| double precision | xcal2j | 
|  | Calories (1 cal = xcal2j J)  More... 
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| double precision | stephn | 
|  | Stephan constant for the radiative module  in  .  More... 
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| double precision | rair | 
|  | Perfect gas constant for air (mixture)  More... 
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| double precision, save | gx | 
|  | Gravity.  More... 
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| double precision, save | gy | 
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| double precision, save | gz | 
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| integer, save | icorio | 
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| double precision, save | omegax | 
|  | Rotation vector.  More... 
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| double precision, save | omegay | 
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| double precision, save | omegaz | 
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| double precision, dimension(3, 3), save
 | irot | 
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| double precision, dimension(3, 3), save
 | prot | 
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| double precision, dimension(3, 3), save
 | qrot | 
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| double precision, dimension(3, 3), save
 | rrot | 
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| integer, save | ixyzp0 | 
|  | Constantes physiques du fluide filling xyzp0 indicator.  More... 
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| double precision, save | ro0 | 
|  | reference density. Negative value: not initialised. Its value is not used in gas or coal combustion modelling (it will be calculated following the perfect gas law, with  and  ). With the compressible module, it is also not used by the code, but it may be (and often is) referenced by the user in user subroutines; it is therefore better to specify its value.  More... 
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| double precision, save | viscl0 | 
|  | reference molecular dynamic viscosity. Negative value: not initialised.  More... 
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| double precision, save | p0 | 
|  | reference pressure for the total pressure. except with the compressible module, the total pressure  is evaluated from the reduced pressure  so that  is equal to p0 at the reference position  (given by xyzp0). with the compressible module, the total pressure is solved directly. always Useful  More... 
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| double precision, save | pred0 | 
|  | reference value for the reduced pressure  (see ro0). It is especially used to initialise the reduced pressure and as a reference value for the outlet boundary conditions. For an optimised precision in the resolution of  , it is wiser to keep pred0 to 0. With the compressible module, the "pressure" variable appearing in the equations directly represents the total pressure. It is therefore initialised to p0 and not pred0 (see ro0). Always useful, except with the compressible module  More... 
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| double precision, dimension(3), save
 | xyzp0 | 
|  | coordinates of the reference point  for the total pressure.  More... 
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| double precision, save | t0 | 
|  | reference temperature.  More... 
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| double precision, save | cp0 | 
|  | reference specific heat.  More... 
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| double precision, save | xmasmr | 
|  | molar mass of the perfect gas in  (if ieos=1)  More... 
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| double precision, save | pther | 
|  | Uniform thermodynamic pressure for the low-Mach algorithm Thermodynamic pressure for the current time step.  More... 
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| double precision, save | pthera | 
|  | Thermodynamic pressure for the previous time step.  More... 
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|  | 
      
        
          | double precision, save ro0 | 
      
 
reference density. Negative value: not initialised. Its value is not used in gas or coal combustion modelling (it will be calculated following the perfect gas law, with  and
 and  ). With the compressible module, it is also not used by the code, but it may be (and often is) referenced by the user in user subroutines; it is therefore better to specify its value.
). With the compressible module, it is also not used by the code, but it may be (and often is) referenced by the user in user subroutines; it is therefore better to specify its value. 
Always useful otherwise, even if a law defining the density is given by the user subroutine usphyv or uselph. indeed, except with the compressible module, CS does not use the total pressure  when solving the Navier-Stokes equation, but a reduced pressure .
 when solving the Navier-Stokes equation, but a reduced pressure .  . where
. where  is a reference point (see xyzp0) and
 is a reference point (see xyzp0) and  and
 and  are reference values (see pred0 and p0). Hence, the term
 are reference values (see pred0 and p0). Hence, the term  in the equation is treated as
 in the equation is treated as  . The closer ro0 is to the value of
. The closer ro0 is to the value of  , the more
, the more  will tend to represent only the dynamic part of the pressure and the faster and more precise its solution will be. Whatever the value of ro0, both
 will tend to represent only the dynamic part of the pressure and the faster and more precise its solution will be. Whatever the value of ro0, both  and
 and  appear in the listing and the post-processing outputs.. with the compressible module, the calculation is made directly on the total pressure
 appear in the listing and the post-processing outputs.. with the compressible module, the calculation is made directly on the total pressure