Celebrating the physics of all that flows. Ask a question, submit a post idea or send an email. You can also follow FYFD on Twitter and YouTube. FYFD is written by Nicole Sharp, PhD.
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Mimicking Plant Movement
Many plants control the curvature of their leaves by selectively pumping water into cells that line the outer surface. This swelling triggers bending. Engineers created their own version of this structure. (Image credit: T. Gao et al.; via GoSM)
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The Channel Tunnel
To celebrate the 30th anniversary of the Channel Tunnel, Practical Engineering takes a look back at the construction and operation of this incredible piece of infrastructure. (Image and video credit: Practical Engineering)
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Reapproaching Supersonic Air Travel
Before the Concorde even began regular flights, protests over its sound levels caused the U.S. and many other countries to ban overland commercial supersonic flight. Those restrictions have stood for fifty years. (Image credit: NASA; via Physics Today)
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#aeronautics#CFD#computational fluid dynamics#fluid dynamics#physics#science#shockwave#sonic boom#supersonic
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"Color Show"
Brightly colored paints and inks mix and flow in artist Roman De Giuli's "Color Show." De Giuli typically creates this fluid art in thin layers atop paper. (Video and image credit: R. De Giuli)
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Dendritic Painting Physics
In the art of Akiko Nakayama, colors branch and split in a tree-like pattern. In studying the process, researchers found the physics intersected art, soft matter mechanics, and statistical physics. (Image credit: A. Nakayama; research credit: S. Chan and E. Fried; via Physics World)
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#fluid dynamics#fluids as art#instability#marangoni effect#non-Newtonian fluids#physics#rheology#science#shear-thinning#surface tension#viscous fingering
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Visualizing Wingtip Vortices
At the ends of an airplane's wings, the pressure difference between air on top of the wing and air below it creates a swirling vortex that extends behind the aircraft. In this video, researchers recreate this wingtip vortex in a wind tunnel, visualized with laser-illuminated smoke. (Video and image credit: M. Couliou et al.)
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Stomp It Out
Drop a ball that's partially filled with water and it may or may not bounce. Why the difference? It all comes down to where the water is before impact. (Video and image credit: A. Martinez et al.; research credit: K. Andrade et al.)
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"Mason Bee at Work"
Mason bees like this one build landmarks to help them navigate as they construct a shelter for their eggs. Even hauling materials, these bees can easily stay aloft. (Image credit: S. Zankl; via Wildlife POTY)
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"Nimbus"
Ephemeral clouds drift through unusual places in artist Berndnaut Smilde's works. He creates his clouds from smoke and water, launching them for a matter of seconds before they dissipate. (Image credit: B. Smilde and collaborators; via Colossal)
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Simeis 147
Sometimes known as the Spaghetti Nebula, Simeis 147 is the remnant of a supernova that occurred 40,000 years ago. The glowing filaments of this composite image show hydrogen and oxygen in red and blue, respectively. (Image credit: S. Vetter; via APOD)
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#astrophysics#fluid dynamics#instability#physics#science#shockwave#stellar evolution#supernova#turbulence
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Light Pillars
These lovely pillars of light over the Mongolian grasslands are the result of tiny, suspended ice crystals. (Image credit: N. D. Liao; via APOD)
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Lasers and Soap Films
Soap films are a great system for visualizing fluid flows. Researchers use them to look at flags, fish schooling and drafting, and even wind turbines. In this work, researchers explore the soap film's reaction to lasers. (Image and research credit: Y. Zhao and H. Xu)
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#elasticity#flow visualization#fluid dynamics#laser#marangoni effect#physics#science#shockwave#soap film#surface tension#surfactant
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Sharpshooters
The sharpshooter's superpower is pee flinging. These insects consume nutrient-poor plant sap, so to get the calories they need, they have to drink 300 times their body weight each day. All that extra liquid has to go somewhere, so the sharpshooter evolved to be an expert excretor. (Video and image credit: Deep Look)
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"Sfumato"
Handmade kinetic sculptures by artists Marion Pinaffo and Raphaël Pluvinage spin and paint the sky in colorful smoke in "Sfumato". (Image and video credit: M. Pinaffo and R. Pluvinage; via Colossal)
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Surviving Rainfall
Water striders spend their lives at the air-water boundary, skittering along this interfacial world. But what happens when falling rain destroys their flat existence? That's the question that motivated today's research study, which looks water striders subjected to artificial rain. (Image credit: top - H. Wang, animations - D. Watson et al.; research credit: D. Watson et al.; via APS Physics)
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#biology#cavity#fluid dynamics#insects#physics#rainfall#science#surface tension#water striders#Worthington jets
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That Drain Life
No matter your cleaning habits, it's possible to get some unexpected roommates. This variety is the drain fly, a species well-adapted to the moist environment of our pipes. (Image and video credit: Deep Look)
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Tornadoes in a Bucket
In nature, some powerful tornadoes form additional tornadoes within their shear layer. These subvortices revolve around the main tornado, causing massive destruction in their wake. (Image and research credit: G. Di Labbio et al. 1, 2)
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