Researchers studying the movement of crowds at a traditional Spanish festival have shown that densely packed groups of people form swirling ‘vortex’ patterns never before documented in human ...

3D printing is an incredible tool for prototyping ... which creates a cooling, swirling vortex boundary layer along the chamber wall. The oxygen moves to the front end of the combustion chamber ...

When the winds come together to create a swirling vortex over a covering of snow, it picks the flakes up off the ground, creating a whirling column of the cold stuff. The WMO calls the phenomenon ...