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  ThermoFluidCalc — Offline Fortran Execution Guide
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Calculator : Binary Diffusivity Estimator
Category   : Masstransfer

Files Included:
  - binary_diffusivity.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 binary_diffusivity.f90 -o binary_diffusivity

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

  binary_diffusivity < 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 (Diffusion Model (1=Gas, 2=Liquid)): 1
  Line 2 (Temperature T [C]): 25.0
  Line 3 (Pressure P [atm] (Gas only)): 1.0
  Line 4 (Solute Molecular Weight MA [g/mol]): 18.015
  Line 5 (Solvent Molecular Weight MB [g/mol]): 28.97
  Line 6 (Solute Lennard-Jones Parameter sigmaA [A]): 2.641
  Line 7 (Solvent Lennard-Jones Parameter sigmaB [A]): 3.711
  Line 8 (Solute Energy Parameter epsA/k [K]): 809.1
  Line 9 (Solvent Energy Parameter epsB/k [K]): 78.6
  Line 10 (Solute Molar Volume VA [cm3/mol] (Liquid only)): 18.0
  Line 11 (Solvent Viscosity muB [cP] (Liquid only)): 1.0
  Line 12 (Association Factor phi (Liquid only)): 1.0
  Line 13 (Liquid Density rho [kg/m3] (Liquid only)): 1.184

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