Freedom251 › Chemical Software
DWSIM
Plans
| Plan | Billed and limits | Price |
|---|---|---|
| DWSIM Open-Source Core Edition | Free to download and use · Open-source core components only; source code available | Free |
| DWSIM MCP Server | Free and open-source (GPL-3) · Headless DWSIM engine over MCP HTTP or stdio; default port 5901; no token by default | Free |
| DWSIM Patreon Edition | Free to download and use; active Patreon Supporter Membership required to save simulations using supporter extras · Open-source core plus Patreon Supporter extras; supporter extras can be tested, but saving simulations that use them requires active membership | On request |
As dwsim.org lists them, read 14 Nov 2026. The maker's own page has the final word.
Facts from DWSIM's own pages
- Accuracy disclaimer
- The project warns that results are approximate and users must validate them for their intended purpose. · dwsim.org, 14 Nov 2026
- AI assistant
- The built-in assistant can answer questions about flowsheets and generate Python and VB.NET snippets. · dwsim.org, 14 Nov 2026
- Data access
- The software provides access to over 120,000 phase-equilibrium datasets in the NIST ThermoML Archive. · dwsim.org, 14 Nov 2026
- Dynamic simulation
- DWSIM supports transient simulation with time-stepping integrators, controllers, and event scheduling. · dwsim.org, 14 Nov 2026
- Edition limits
- Several advanced features, including simultaneous and equation-oriented solvers, are Patreon Edition exclusives. · dwsim.org, 14 Nov 2026
- History
- DWSIM originated in 2004 from Excel VBA macros implementing PR EOS and a basic flash algorithm. · dwsim.org, 14 Nov 2026
- Integration
- DWSIM is CAPE-OPEN compliant and has CoolProp integration for pure fluids and incompressible mixtures. · dwsim.org, 14 Nov 2026
- License
- The project describes DWSIM as free and open source under GNU GPL v3. · dwsim.org, 14 Nov 2026
- Platforms
- The download page lists Windows, Linux, macOS, Android, and iOS availability. · dwsim.org, 14 Nov 2026
- Purpose
- DWSIM is a chemical process simulator for modeling steady-state and dynamic flowsheets. · dwsim.org, 14 Nov 2026
- Security
- The MCP server listens on all interfaces without a token by default; the download page advises setting a token on untrusted networks. · dwsim.org, 14 Nov 2026
- Thermodynamics
- It includes property packages such as Peng-Robinson, NRTL, UNIQUAC, Wilson, and UNIFAC. · dwsim.org, 14 Nov 2026
- Unit operations
- The simulator includes more than 35 unit operations, including columns, heat exchangers, reactors, and pumps. · dwsim.org, 14 Nov 2026
Where DWSIM stands on Freedom251
- Chemical Software#1 of 15