It’s Schlier-tastic!!
These are my invisible wonders!  Gas flows and fluid interactions.  Nothing but hot air, metho and acetone, yup, humble old nail polish remover.
The images were captured using a colour indicating z-system schlieren optical array, an open shutter and a flash duration of 125 microseconds.

It’s Schlier-tastic!!

These are my invisible wonders!  Gas flows and fluid interactions.  Nothing but hot air, metho and acetone, yup, humble old nail polish remover.

The images were captured using a colour indicating z-system schlieren optical array, an open shutter and a flash duration of 125 microseconds.