From drop to diagnosis
Emily Higgins
Look at any coffee stain, and you’ll see that the outline is much darker than the interior. This “coffee-ring effect” occurs when a droplet of liquid evaporates, pushing suspended particles toward the edge. If the particles are pigmented, as in coffee, the stain’s rim appears darker around the rim than its center. Now, Berkeley engineers… The post From drop to diagnosis appeared first on UC Berkeley Mechanical Engineering .