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  ThermoFluidCalc — Offline Fortran Execution Guide
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Calculator : Lumped System Transient Analysis
Category   : Conduction

Files Included:
  - lumped_system_analysis.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 lumped_system_analysis.f90 -o lumped_system

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

  lumped_system < 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 (Geometry (1=Sphere, 2=Cylinder, 3=Plane Wall, 4=Cube)
): 1
  Line 2 (Radius/Half-thickness [m]
): 0.005
  Line 3 (Thermal conductivity k [W/m-K]
): 63.9
  Line 4 (Density rho [kg/m3]
): 7832.0
  Line 5 (Specific heat Cp [J/kg-K]
): 434.0
  Line 6 (Convection coefficient h [W/m2-K]
): 12.0
  Line 7 (Initial temperature Ti [Â°C]
): 500.0
  Line 8 (Ambient temperature Tinf [Â°C]
): 25.0
  Line 9 (Target temperature T_target [Â°C]): 50.0

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