The texture of roughened surfaces can be critical to their properties. Here a roughened Al surface is shown under SEM, which was used to reduce drag under turbulent flow. False coloured. Image courtesy of Dr. K. Golovin.
![](https://apsc-golovin.sites.olt.ubc.ca/files/2017/12/Engrained-in-UM-Love-360x248.jpg)
The texture of roughened surfaces can be critical to their properties. Here a roughened Al surface is shown under SEM, which was used to reduce drag under turbulent flow. False coloured. Image courtesy of Dr. K. Golovin.