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Why is the XXX physical property model not in LIBPF ?

Experience has shown that about 80% of processes can be modeled with sufficient accuracy using just 20% of the physical property models. In other words, 80% of the value can be obtained with 20% of the effort.

Pareto 80-20 principle

LIBPF does not even try to provide every possible physical property model, and just targets the most frequently used ones: currently (as of version 0.9) for for phase equilibria we have:

  • Ideal (raoult and Henry laws);
  • NRTL activity coefficient model;
  • Van der Waals, Peng-Robinson and Redlich-Soave-Kwong cubic equations of state and;
  • PC-SAFT statistical equation of state

The library can be extended by our customers autonomously or with our support.

Implementing a new model actually takes less effort compared to other tools, thanks to the object-oriented approach and to the infrastructure provided by the library (analytical derivatives, solvers, root-finding algorithms).

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