What to use Wind Tunnel for
Wind Tunnel is a lattice Boltzmann fluid flow simulator, not a toy, and it saves what it makes. Five things people use it for, each with a link that opens it ready to go.
A physics lesson: three Reynolds numbers
Show the class what the Reynolds number does, on the textbook body, a round post.
At Re 30 the wake lies still: two eddies sit behind the post and nothing is shed. At Re 150 the vortex street forms, the eddies leaving one side, then the other. At Re 2000 the wake turns ragged, the start of turbulence.
Turn on Explain the picture to label the body, the shear layers and the two rows, with the shedding rate read live as the Strouhal number, close to 0.2 for the cylinder.
A motion background in your brand colours
Set the five colours under Colour to your brand: the sea as the background, Ink as the accent, Stripes as a quiet second colour. Every look follows them.
Save the moment as a PNG with Transparent background (PNG) on to lay it over a page or a slide, or record a 4K MP4 of 20 or 30 seconds for a hero video or a talk. For a loop, record at least 20 seconds and cut on a shed: the street repeats itself.
A science post with the satellite photo beside it
Pick a famous island, set the Cloud look and the Satellite palette, and turn on Satellite photo: NASA's picture of the real street sits beside the simulation. Save a 4K PNG of the two, or record the flow and pair it with the photo.
Every photo is NASA's and in the public domain; the credit line is on the island's page.
Open Guadalupe as photographed
Reading the wind shadow behind an island
Kite surfers and sailors know that the water downwind of an island is fickle: slack in one place, gusting in the next. The Speed look shows why: cold where the flow stalls behind the land, warm where it races past the points, and the eddies carrying slow air downwind in turn.
Try Mauritius in the south-east trade wind, or draw your own bay with Draw. It is a two-dimensional model at a small Reynolds number, a way to see the pattern, never a forecast for a session.
A design element: the Blueprint palette
The Blueprint palette draws white lines on a deep blue, like an engineering drawing. Use Paper for crisp lines, pause with Space on a good moment, and save a 4K PNG with Transparent background (PNG) on for a poster, a cover or a section divider.
Open a silhouette of your logo under Open a silhouette and the wind flows around your own shape.