AI Process Simulator

AI Process Simulator is a steady-state chemical process simulator built in collaboration with Claude (Anthropic’s AI) using modern C++ (C++17/20) and Qt/QML. If you’ve used Aspen HYSYS or Aspen Plus it will feel familiar — you place equipment on a canvas, connect material streams, assign a fluid package, and specify each block by fixing a few variables and letting the solver find the rest. It models a broad set of unit operations — a rigorous distillation column (plus absorbers and strippers), five reactor types (conversion, equilibrium, Gibbs, plus kinetic PFR and CSTR), a liquid-liquid extractor, compressor/expander, heat exchanger, heater/cooler, pump, valve, two-phase pipe segment, mixer, splitter, two-phase and three-phase separators, a recycle, Adjust/Spec logical blocks, and a scriptable Python unit for anything a built-in block doesn’t cover — with industry-standard thermodynamics (SRK, Peng-Robinson, PRSV, NRTL, UNIFAC), petroleum pseudo-component characterization, and the full set of flash calculations. Columns solve the rigorous MESH equations, five to ten times faster than a year ago; the flowsheet solves continuously as you work or on demand via an ordered Solve All that skips whatever hasn’t changed, and recycle loops converge automatically. The column also has an embedded AI convergence advisor that can diagnose why a column won’t converge and suggest how to fix it.

A section of plant can now be wrapped in a sub-flowsheet — one block on the parent’s canvas, a complete flowsheet inside it, nested to any depth — with a Navigator to move through the case, each sheet carrying its own title block and revision history, and datasheets and prints that cover the whole plant. A built-in validation system carries over 750 documented checks against published data, readable inside the app. A growing library of example cases imports directly from DWSIM and COCO/COFE and matches their results stream-by-stream — including a published oil-and-gas separation benchmark of 55 streams and 41 unit operations, where the simulator reproduces the reference Reid vapour pressure to within half a percent. It’s an actively developed project, with more to come.

For best results – Download using the Chrome Browser

Windows may show a “Windows protected your PC” screen because the app is newly published — click More info → Run anyway to install. The download also includes a samples directory with several .sim cases and DWSIM import cases to try.