Celebrating the physics of all that flows with Nicole Sharp, Ph.D.
- Profile
Cleaning the Skies
Those of us who live in urban environments have experienced the clear, pollution-free air that comes after a rainstorm. But how exactly does rain clean the air? Air pollution typically has both gaseous and particulate components to it. As a raindrop falls, it experiences collision after collision with those particles. Depending on the particle’s surface…
Beautiful Waves
Australian photographer Ray Collins captures some of the most impressively dynamic photographs of ocean waves I’ve ever seen. The textures of the water range from glassy smooth to scaled to violent sprays of droplets. You can easily get lost in every image. For more, check out his website and Instagram. (Image credits: R. Collins; via…
Sound Makes Stickier Bandages
Keeping wounds safe and clean is hard when bandages are so prone to coming off. A team of researchers may have found a solution, though, using ultrasound to enhance adhesion. For their technique, they applied a layer of adhesive primer to the skin and covered it with a hydrogel bandage. Then they used an ultrasound…
Flow Between Fibers
Two vertical fibers, with a gap left between them, form a playground for flow in this Gallery of Fluid Motion video. If the fiber spacing is small enough, the flow will form a stable liquid sheet that runs the full length of the fibers. With a little more distance, though, the fluid forms intermittent bridges,…
Escaping the Sun
One enduring mystery of the solar wind — a stream of high-energy particles expelled from the sun — is how the particles get accelerated in the first place. The sun frequently belches out spurts of plasma, but without further momentum, that material simply falls back to the sun’s surface under the star’s gravity. Mechanisms like…
Recreating the Rings of Power Opening
Everyone loves a good title sequence, especially when they feature neat visuals. Many who watched “The Rings of Power” zeroed in immediately on their use of cymatics — visuals born from the vibrations of sound. In the video above, Steve Mould delves into the physics behind cymatics and recreates patterns similar to those in the…
“Crystallizing Epsom Salts”
Candy-colored crystals emerge from a salty liquid in this macro video of Epsom salt crystallization by Karl Gaff. The video was an honorable mention in the 2022 edition of the Nikon Small World in Motion competition. The wild colors in the video come from illumination with polarized light, which makes the crystals appear different colors…
Testing Full-Size Engines
Engineers can often use small-scale models to test the physics of their creations, but sometimes there’s no substitute for going large. In this photo, we see a full-size commercial engine used on an airplane, mounted at the Instituto Nacional de Tecnica Aeroespacial (INTA) in Madrid. Behind the engine, in red, is an optical rig used…
Moths and Beetles in Flight
Watching insects take flight in high-speed video is always mesmerizing. So often their wings look too small and fragile to lift their bulbous bodies, but they manage the feat easily. I especially like to watch how much their wings flex during each up- and downstroke. So often we think that stiffer wings — like those…
Droplet Bounce
A droplet falling on a liquid bath may, if slow enough, rebound off the surface. Its impact sends out a string of ripples — capillary waves — on the bath’s surface and sends the droplet itself into jiggling paroxysms. A new pre-print study delves into this process through a combination of experiment, simulation, and modeling.…