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RocketWorkbench
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Based on the original Rocket Workbench on SourceForge in CVS at: https://sourceforge.net/projects/rocketworkbench
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RocketWorkbench/rockflight/test/density.cc

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Initial commit of "Rocket Workbench". Taken from sources in CVS at: https://sourceforge.net/projects/rocketworkbench/ Sources extracted in two steps: 1. Pull entire project tree into a subdir "rwb" via "rsync": rsync -a a.cvs.sourceforge.net::cvsroot/rocketworkbench/ rwb/. 2. Export sources: export CVSROOT=$(pwd)/rwb SUBDIRS="analyser cpropep cpropep-web CVSROOT data libcompat libcpropep libnum libsimulation libthermo prop rocketworkbench rockflight" mkdir rwbx; cd rwbx cvs export -D now ${SUBDIRS} After this (and some backups for safety), the directory content was added to a Git repo: git init . git add *
4 years ago
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  1. function rho = density(y)
  2. 

  3.   P0 = 1.013e5;     # standard stmospheric pressure
  4.   Ma = 0.0289644;   # atmosphere molar mass
  5.   Rg = 8.3145;      # perfect gas constant
  6.   T  = 273.15;      # standard temperature 
  7.   
  8.   G  = 6.67259e-11; # gravitational constant 
  9.   Mt = 5.98e24;     # earth mass
  10.   Rt = 6370000;     # earth radius
  11.   
  12.   rho = (P0*Ma/(Rg*T))*exp( ((Ma*G*Mt)/(Rg*T))*((1/(Rt+y))-(1/Rt)) );
  13. 

  14. endfunction