DWSim Email This Post Print This Post


DWSIM is an open-source, steady-state chemical process simulator written in VB.NET. It has a HYSYS-like interface with many of the features present in commercial simulators:

  • Thermodynamic models: Peng-Robinson, Soave-Redlich-Kwong, Lee-Kesler, UNIFAC, Ideal Gas;
  • Unit operations: Mixer, splitter, separator, pump, compressor, expander, heater, cooler, valve, pipe segment, chemical reactors;
  • Utilities: Phase envelope, hydrate calculations, pure component properties, critical point;
  • Tools: Hypothetical components generator, C7+ petroleum characterization, reactions manager.

SF project website:

Development blog:


DWSim: Main interface

Main interface

DWSim: Component selection

Component selection

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