Setting up a CFD simulation today takes a specialist about a week. You configure files, pick from many possible solvers, tune parameters, and debug when things fail. Specialists do this every day. Non-specialists don't even try.
SIMD Agent collapses that into a paragraph of intent plus a 3D model. Today it's open source.
What it does
You describe the physics you want to understand, such as heat transfer, flow, pressure drop, or mixing. You give it the geometry. The agent picks the right simulation method, sets it up, runs it, and streams the results back. When the simulation fails, it diagnoses the failure and retries with focused fixes.
Questions that usually take a CFD specialist a week to set up, like "does this part overheat?" or "what's the pressure drop across this duct?", become a paragraph of intent plus a geometry.
Why open source
CFD setup is gatekeeping disguised as expertise. The knowledge needed to translate "I want to understand this physical problem" into a working simulation lives in books, papers, and the heads of a few hundred engineers worldwide.
We can't build a tool that captures that knowledge without those engineers giving us feedback, and we can't get that feedback behind a paywall. So we're putting it in the community's hands and seeing what they build.
What's next
Better automatic recovery when simulations fail. More flow regimes. A command-line interface for power users. Templates for common cases. The full roadmap is on the website.
If you've been waiting to see the code, it's here. Try it. Tell us what's missing.