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  ThermoFluidCalc — Offline Fortran Execution Guide
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Calculator : Gray Enclosures & Shields
Category   : Radiation

Files Included:
  - gray_radiation.f90 (Fortran Source Code)
  - input.txt (Pre-configured Sample Input)

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1. How to Compile
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Make sure you have a Fortran compiler installed (like gfortran).
Run the following compilation command in your terminal:

  gfortran -O3 gray_radiation.f90 -o gray_radiation

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2. How to Execute
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Run the compiled binary and redirect the input.txt file into stdin:

  gray_radiation < input.txt

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3. Input File Details
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The input file 'input.txt' contains sequential parameters separated by
newlines. Here is the structure of the included 'input.txt':

  Line 1 (Mode (1=Two-Surface Enclosure, 2=Radiation Shields)
): 1
  Line 2 (Enclosure Geometry (1=Parallel Plates, 2=Concentric Cylinders, 3=Concentric Spheres)
): 1
  Line 3 (Temperature T1 [Â°C]
): 600.0
  Line 4 (Temperature T2 [Â°C]
): 100.0
  Line 5 (Area A1 [m2]
): 1.0
  Line 6 (Area A2 [m2]
): 1.0
  Line 7 (Emissivity eps1
): 0.8
  Line 8 (Emissivity eps2
): 0.2
  Line 9 (View Factor F12): 1.0

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