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  ThermoFluidCalc — Offline Fortran Execution Guide
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Calculator : Annular (Circular) Fin Efficiency
Category   : Conduction

Files Included:
  - annular_fin_efficiency.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 annular_fin_efficiency.f90 -o annular_fin

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

  annular_fin < 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 (Inner radius r1 [m]
): 0.025
  Line 2 (Fin thickness t [m]
): 0.002
  Line 3 (Corrected outer radius r2c [m]
): 0.065
  Line 4 (Thermal conductivity k [W/m-K]
): 200.0
  Line 5 (Convection coefficient h [W/m2-K]
): 25.0
  Line 6 (Base temperature T0 [Â°C]
): 100.0
  Line 7 (Ambient temperature Tinf [Â°C]): 20.0

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