FlatSixDynamics
Live computational fluid dynamics, on your iPhone.
A two-dimensional cross-section of a mid-engine sports car. The surrounding air solved live on the Metal GPU using the compressible Navier–Stokes equations. The velocity field shown as vector arrows. The pressure field shown as a heatmap. A speed slider from zero to four hundred kilometres per hour.
Nothing precomputed. Every frame is solved as you look at it.
It is built to be looked at. It is not built to design a car. A two-dimensional slice cannot capture the wing-tip vortices, the floor flow, the cooling air paths, the side-glass separation. Engineering teams use full three-dimensional unsteady RANS or LES on machine-room-scale clusters; this is none of those things. It runs on your phone.
If you came here for the aerodynamic intuition — the way a pressure wave hugs a roofline, the way the wake closes behind a deployed spoiler — the App will reward you. If you came here for numbers to put in a slide deck, please don't.
Methods
2D compressible Navier–Stokes · HLLC Riemann solver · MUSCL reconstruction · SSP-RK3 time integration · 512 × 192 cells · body-fitted curvilinear grid near the surface.