LensaSim
Sim

A real process simulator. In your browser.

Build and converge industrial flowsheets with a built-in AI tutor — no licence fees, no installs.

Start simulating — free Take a guided lesson
52
Unit operations
3,900+
Component databank
11
Property packages
7
Analysis environments

How it works

  1. The LensaSim simulator with an ammonia synthesis loop converged and its stream table below

    Step 1

    Build it

    Draw a flowsheet from 52 unit operations, pick a property package, and solve it — recycles and all.

  2. A flowsheet published on LensaSim Connect: the ammonia synthesis loop, its author, and Fork & run

    Step 2

    Show it

    Publish it on LensaSim Connect, where lecturers, employers and other engineers can open it and run it again.

  3. A LensaSim test as a student sees it: the brief, its targets and limits, and the design to build

    Step 3

    Prove it

    Sit a lecturer's test or an employer's assessment. Your design is re-solved and checked on our servers, and the result counts toward your grade or the job.

Built to be trusted

Methods you can inspect

Every method is named and every result can be traced: the property package, the solver, the convergence history. Property data comes from validated, openly licensed sources.

Honest about its limits

LensaSim is for education, training, conceptual design and research. It is not for final commercial design or safety-critical decisions — those need validated tools and professional review.

Ready for institutions

Campus licences, your LMS over LTI 1.3, grades on your own scale, and a privacy statement that says what is kept and for how long.

Build your first flowsheet in minutes

Start simulating — free See plans

No installs Free simulation, always