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  ThermoFluidCalc — Offline Fortran Execution Guide
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Calculator : Composite Plane Wall Conduction
Category   : Conduction

Files Included:
  - steady_heat_conduction_plane_walls.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 -ffree-line-length-none steady_heat_conduction_plane_walls.f90 -o heat_conduction

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

  heat_conduction < 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 (Number of layers (N)): 3
  Line 2 (Base Temperature ($T_0$) [°C]): 150.0
  Line 3 (Ambient Fluid Temperature ($T_\infty$) [°C]): 20.0
  Line 4 (Layer 1 Thickness ($L_1$) [m]): 0.05
  Line 5 (Layer 1 Conductivity ($k_1$) [W/m-K]): 15.0
  Line 6 (Layer 2 Thickness ($L_2$) [m]): 0.03
  Line 7 (Layer 2 Conductivity ($k_2$) [W/m-K]): 60.0
  Line 8 (Layer 3 Thickness ($L_3$) [m]): 0.02
  Line 9 (Layer 3 Conductivity ($k_3$) [W/m-K]): 1.2
  Line 10 (Convection Coefficient ($h$) [W/m²-K]): 10.0

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