A smoke tunnel for lecture demonstrations

Rendering fluid flow visible can be of great help in the teaching of Mechanics of Fluids and Aerodynamics. A smoke tunnel for lecture demonstrations was developed at a leading university and, since others wanted it, the design was passed to Plint and Partners Ltd, who now manufacture it. The unit is simple to operate and is mobile, while the smoke produced is non‐toxic and insufficient in quantity to be objectionable. A general view is shown in FIGURE 1.