#2019GOFM

[fuckyeahfluiddynamics]

The Miscible Faraday Instability

Vibrate a pool of water in air and the interface will form a distinctive pattern of waves called the Faraday instability. But what happens when you vibrate the interface between two fluids that can mix?  (Video, image, and research credit: G. Louis et al.) Read the full article

#2019GOFM #Faraday instability #fluid dynamics #mixing #physics #science #turbulence

[fuckyeahfluiddynamics]

Vortex Rings From a Square Outlet

When a vortex ring forms, it's often from fluid forced through a round outlet, whether that's someone's mouth, a pipe, or a dolphin's blowhole. But vortex rings can come from other shapes, too. (Image, video, and research credit: B. Steinfurth et al.) Read the full article

#2019GOFM #flow visualization #fluid dynamics #physics #science #vortex rings

[fuckyeahfluiddynamics]

Shear and Convection in Turbulence

In nature, we often find turbulence mixed with convection, meaning that part of the flow is driven by temperature variation. Think thunderstorms, wildfires, or even the hot, desiccating winds of a desert. To better understand the physics of these phenomena, researchers simulated turbulence between two moving boundaries: one hot and one cold. (Image, research, and video credit: A. Blass et al.) Read the full article

#2019GOFM #convection #direct numerical simulation #DNS #fluid dynamics #numerical simulation #physics #science #shear #turbulence

[fuckyeahfluiddynamics]

In this award-winning video from the 2019 Gallery of Fluid Motion, we see how the geometry of a superhydrophobic surface can alter a splash. (Image and video credit: The Lutetium Project)

#fluid dynamics #science #physics #2019GOFM #droplet impact #fluids as art #superhydrophobic

[fuckyeahfluiddynamics]

Simulating Better Breaking Waves

In the ocean, breaking waves trap air into bubbles that then cluster into foam, but conventional simulations don't capture this foaminess. For bubbles to cluster into foam, there has to be a force preventing -- or at least delaying -- their coalescence. (Image and video credit: P. Karnakov et al.) Read the full article

#2019GOFM #breaking wave #bubbles #fluid dynamics #foam #numerical simulation #physics #science #surface tension

[fuckyeahfluiddynamics]

Storm Eyes and Mushrooms in a Drop

In industry, drying droplets often have many components: a liquid solvent, solid nanoparticles, and dissolved polymers. The concentration of that last component -- the polymers -- can have a big effect on the way the droplet dries, as seen here. (Video, image, and research credit: J. Zhao et al.) Read the full article

#2019GOFM #APSDFD #droplets #evaporation #flow visualization #fluid dynamics #inverse energy cascade #physics #polymer effects #science

[fuckyeahfluiddynamics]

Crystalline Critters

In 5th grade, I grew crystals by evaporating solutions of salt water from miniature pie tins. But it turns out I could have gotten much cooler results if I'd evaporated my salt water a drop at a time on a hot superhydrophobic surface. (Video, image, and research credit: S. McBride et al.) Read the full article

#2019GOFM #droplets #evaporation #fluid dynamics #physics #science #superhydrophobic

[fuckyeahfluiddynamics]

Why Watering Globes Are Hard to Fill

If you're leaving home for a few days and want to keep your houseplants happy, you may have tried using a watering globe. And if you have used one, you've probably noticed what a pain they are to fill. (Image and video credit: E. Challita et al.) Read the full article

#2019GOFM #fluid dynamics #Helmholtz resonance #physics #plants #science #watering globe

[fuckyeahfluiddynamics]

The Explosive Vaporization Derby

When pressurized, liquids can be superheated to temperatures well above their normal boiling point. When the pressure is released, the liquid will start boiling, sometimes explosively. (Video and image credit: K. Jing et al.) Read the full article

#2019GOFM #boiling #fluid dynamics #physics #science #superheating #vaporization

[fuckyeahfluiddynamics]

Some water-walking insects are able to leap off a watery interface. One way to model these creatures is with elastic hoops, which can also propel themselves off the water's surface. (Image, video, and research credit: H. Jeong et al.)

#fluid dynamics #science #physics #2019GOFM #elasticity #fluid-solid interaction #superhydrophobic #surface tension

[fuckyeahfluiddynamics]

When placed on a very hot, patterned surface, droplets will self-propel on a layer of their own vapor. Researchers used this to coalesce droplets so that they could observe how well they mix. (Image, video, and research credit: Y. Chiu and C. Sun)

#fluid dynamics #science #physics #2019GOFM #coalescence #Leidenfrost droplets #Leidenfrost effect #mixing

[fuckyeahfluiddynamics]

When a drop of water falls into a pool, it doesn't always coalesce immediately. And the same, it seems, is true for heavy metals. (Image, video, and research credit: R. McGuan et al.)

#fluid dynamics #science #physics #2019GOFM #coalescence cascade #coalescence #droplets #heavy metals

[fuckyeahfluiddynamics]

A water droplet immersed in a mixture of anise oil and ethanol displays some pretty complicated dynamics. (Image and video credit:  S. Yamanidouzisorkhabi et al.)

#fluid dynamics #science #physics #2019GOFM #chemistry #convection #droplets #Marangoni effect #miscibility #ouzo #surface tension #turbulence

[fuckyeahfluiddynamics]

What happens when you drop a hydrogel bead on a water droplet? (Image, research, and video credit: R. Rabbi et al.)

#fluid dynamics #science #physics #2019GOFM #droplet impact #droplet rebound #hydrogel #viscoleasticity

[fuckyeahfluiddynamics]

Collapsing soap films buckle and wrinkle elastic bands in this APS DFD Gallery of Fluid Motion video.  (Image, video, and research credit: F. Box et al.; see also F. Box et al. on arXiv)

#fluid dynamics #science #physics #2019GOFM #soap film #buckling #fluid-solid interaction #surface tension

[fuckyeahfluiddynamics]

When bubbles burst, we often pay attention to the retracting film and forming droplets, but what happens to the air that was inside? (Image and research credit: A. Dasouqi and D. Murphy; video credit: Science; see also A. Dasouqi and D. Murphy)

#fluid dynamics #science #physics #bubbles #flow visualization #2019GOFM #vortex rings