Matter & Flow

The Wind Tunnel

Choose a car, truck, or jet, or import a 3D model. Compare airflow around its silhouette.

Follow the flow around an obstacle

Two-dimensional flow

Draw a wall, choose a vehicle, or import a model. Gold and cyan show opposite vorticity.

Live measurements

booting...

Change the conditions

Set the flow conditions

obstacles:

In tunnel: Cylinder

Vehicles & 3D models

Import your own model

OBJ or STL · up to 20 MB and 100,000 triangles. Files stay on your device. Materials and textures are ignored.

Airflow is simulated in 2D. The selected view of a 3D model becomes a solid silhouette. Compare how different views change its wake; this does not calculate full 3D aerodynamics.

flow speed u0 = 0.08 viscosity nu = 0.020 (lower = thinner fluid) draw / erase brush size = 5 experiment speed

TRY THIS

Choose Race car, Semi-truck, or Jet. Rotate the preview or choose Side, Front, or Top, then Apply this view. Import your own OBJ or STL with Choose File.

What you are seeing

Follow the flow around an obstacle

Compare the wake after changing the object's silhouette, angle, or size. Apply resets the flow; give each view time to develop.

A two-dimensional lattice-Boltzmann flow model. A 3D model's projected silhouette becomes the solid obstacle; this does not calculate full 3D aerodynamics. Resolution, boundaries, and stable parameter ranges limit numerical accuracy.