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  ThermoFluidCalc — Offline Fortran Execution Guide
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Calculator : Forced Tube Flow Internal Convection
Category   : Convection

Files Included:
  - internal_flow_convection.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 internal_flow_convection.f90 -o internal_flow_conv

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

  internal_flow_conv < 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 (Tube Inner Diameter ($D$) [m]): 0.025
  Line 2 (Tube Length ($L$) [m]): 6.0
  Line 3 (Wall Temperature ($T_s$) [°C]): 100.0
  Line 4 (Inlet Fluid Temperature ($T_{in}$) [°C]): 20.0
  Line 5 (Mass Flow Rate (m) [kg/s]): 0.15
  Line 6 (Fluid Density ($\rho$) [kg/m³]): 997.0
  Line 7 (Fluid Viscosity ($\mu$) [Pa-s]): 0.00089
  Line 8 (Fluid Conductivity ($k$) [W/m-K]): 0.607
  Line 9 (Prandtl Number ($Pr$)): 6.2
  Line 10 (Specific Heat ($C_p$) [J/kg-K]): 4180.0

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