Standard Physics (formerly Inviscid AI) builds Fast Physics Simulations for Rapid Design and Real Time Control. Y Combinator-backed.
Singapore
Joined February 2026
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We are Introducing an AI engineer that turns physics simulations into better designs
It redesigned a data centre’s cooling system to use less electricity and found a turbine blade that beat a leading published design
Today we’re open-sourcing the simulation agent behind it
Reynolds is the open-source agent behind those simulations. Describe a flow in plain English and it builds the case, runs OpenFOAM and returns the files so you can rerun it.
Its MIT licence lets you modify the code, run it locally or build it into a product you sell.
If you have a design you’d like to improve or want to see how it performs before you build it, send us a DM.
Read more here
standardphysics.com
Try Reynolds
tryreynolds.com
GitHub
github.com/InviscidAI/OpenRe…
PC builders have argued for years over whether case fans should push more air in than they pull out, or the other way round. So we put the same PC through both and watched the air the graphics card actually breathes. The full case is free to run yourself: github.com/InviscidAI/Openfo…
Elite marathoners chase records tucked in behind pacemakers, and runners have argued for years about how much that actually saves.
This is the same runner at world-record pace three ways: on her own, right behind one pacer, and behind two pacers running side by side. The number is the air resistance on her, straight from the simulation.
Where would you tuck in?
Full case files including the runner models, the mesh and the command that produced it:
github.com/InviscidAI/Openfo…
Every winter someone tells you to flip your ceiling fan so it blows upward.
This is the same room, heater and fan three times over: fan off, blowing down, and reversed, from the moment everything is switched on.
Which way does yours turn in winter?
Full case files including the mesh, the fan and heater setup, and the command that produced it:
github.com/InviscidAI/Openfo…
Physicists have been assuming the cow is a sphere for decades, so we put one in the wind next to an actual cow.
Full case files, including the cow:
github.com/InviscidAI/Openfo…
When the US Department of Energy tested single-hose portable air conditioners, two of the four ended up heating the room they were supposed to cool. We ran the same unit in the same room with one hose and with two to see where the air goes.Which kind do you have?Full case files including mesh, dictionaries, the command that produced it:
github.com/InviscidAI/Openfo…
Every claim is checked: "two of the four" is
Riders argue about whether a taller windscreen stops the buffeting or makes it worse.
We put three screen heights on a sportbike to see where the air coming off the top of the screen ends up.
Which one is on your bike?
Full case files including mesh, dictionaries, the command that produced it:
github.com/InviscidAI/Openfo…
A chef's post on Reddit calling air fryers just convection ovens with an extra fan got 47,000 upvotes, so we put the same fan and the same food in both to see what the air actually does.
Which one do you have at home?
Full case files including mesh, dictionaries, the command that produced it:
github.com/InviscidAI/Openfo…
Window fan blowing in vs blowing out. Same room, same fan, same scale on both panels.
Which way is yours pointing?
Full case files including mesh, dictionaries, the fan curve, the command that produced it:
github.com/InviscidAI/Openfo…