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DWSIM is a multiplatform, CAPE-OPEN compliant chemical process simulator for Windows, Linux, Android, macOS and iOS. Built on the top of the Microsoft .NET 4.5 and Mono Platforms and featuring a rich Graphical User Interface (GUI), DWSIM allows chemical engineering students and chemical engineers to better understand the behavior of their chemical systems by using rigorous thermodynamic and unit operations' models with no cost at all.

DWSIM has an easy-to-use graphical interface with many features previously available only in commercial simulators:

  • CAPE-OPEN features (Windows): Thermo 1.0/1.1 Property Package Socket, Thermo 1.1 Property Package Server, Unit Operation Socket and Flowsheet Monitoring Object support. Additionally, DWSIM exposes its Python Script (Custom) Unit Operation for all CAPE-OPEN compliant simulators.
  • Thermodynamic models: PC-SAFT, FPROPS, CoolProp, Peng-Robinson, Soave-Redlich-Kwong, Lee-Kesler, Lee-Kesler-Plöcker, UNIFAC, Modified UNIFAC (Dortmund), UNIQUAC, NRTL, COSMO-SAC, LIQUAC*, Extended UNIQUAC, Chao-Seader, Grayson-Streed, Raoult's Law, IAPWS-IF97 Steam Tables, IAPWS-08 Seawater, Black-Oil and Sour Water;
  • Unit Operations: Mixer, Splitter, Separator, Pump, Compressor, Expander, Heater, Cooler, Valve, Pipe Segment, Shortcut Column, Heat Exchanger, Reactors, Component Separator, Orifice Plate, Distillation/Absorption Columns, Solids Separator, Cake Filter, Excel, Script and Flowsheet Unit Operation;
  • Utilities: Phase Envelope, Hydrate Calculations, Pure Component Properties, Critical Point, PSV Sizing, Vessel Sizing, Spreadsheet and Petroleum Cold Flow Properties;
  • Tools: Binary Data Regression, Compound Creator, Bulk C7+ and Distillation Curves Petroleum Characterization and Reactions Manager;
  • Process Analysis: Multivariate Constrained Optimization and Sensitivity Analysis utility;
  • Extras: Scripting System and Plugins Interface.


For detailed information about the release notes, system requirements and system-specific installation instructions, please go to the Downloads page.


  • Click here to see a list with all pages in this Wiki.
  • Check the Features, FAQ and What's New pages for more information about DWSIM main features.
  • The tutorials section contains links to videos and articles to help you with general DWSIM usage.
  • If you have a bug to report, use the ticket system for DWSIM. You might want to take a look at the Knowledge Base section before creating a new bug ticket.
  • If you are looking for some support on using DWSIM or have something to share with other users, use one of the Forums available in the Sourceforge project page. Support is available in English and Brazilian Portuguese languages.
  • You can also subscribe to the Mailing Lists as an alternative/complement to the Support Forums.

How to help

  • DWSIM for Windows/Linux/macOS is currently developed and mantained by Daniel Medeiros and Gregor Reichert. Contact Daniel through this link if you want to give some additional help.
  • You can always make a donation to this project.
  • DWSIM for Android/iOS is developed, supported and mantained by Daniel Medeiros.
Personal tools

Extensions (Plugins)
Standalone Thermo
Mobile Apps
Source Code
Mailing Lists