#turbulence — Public Fediverse posts

💁🏻‍♀️ TIL: 🦅💨 The nankeen #kestrel, a tiny Australian #falcon, flies with exceptional stability in turbulent winds, inspiring one international #research team.

Wind tunnel #experiments showed wing and tail extensions helped #birds maintain lift and reduce #flight irregularities. The team aims to integrate these features into small #drones as #climatechange increases atmospheric #turbulence.

👉 https://www.popsci.com/technology/falcon-aircraft-turbulence/

#biomimicry #nankeekestrel #engineering #robotics #climate #aviation #australia #animals #technology #tech

Our fleet of #multicopter​s is growing as we prepare for our part in the #TeamX¹ campaign in 🇦🇹 #Austria next month.

We'll provide valuable in-situ #temperature, #humidity, #wind and #turbulence measurements with our custom meteorological PARASITE system on multiple copters in parallel across the Inn valley. This data will help with understanding wind shear in mountainous regions and eventually improve
#mountainWeather forecasts.

Our PARASITEs carry several atmospheric sensors and we derive the turbulent 3D wind vector from the copter movements. @nobodyinperson suggested to name them like #BugsLife characters 🐛😉. He put a nicely customized ❄️ #NixOS in there to stay in control of the software, integrate it all and sync data e.g. to a #forgejoAneksajo instance (#forgejo with #gitAnnex support), our own or the one of @fzj_rdm during the VITAL campaign last year.

#Austria #Österreich #Inntal #Innsbruck #meteorology

¹https://www.teamx-programme.org/observational-campaign/

“Legend”

Filmmaker Roman De Giuli returns to his roots with this short fluid-filled film inspired by the color gold. He combines paint, ink, powders, and particles in a mix of micro- and macroscale photography. As always, the results are a mesmerizing plethora of fluid phenomena: Marangoni flows, turbulence, vorticity, viscous fingering and so much more. (Video and image credit: R. De Giuli)

#fluidDynamics #fluidsAsArt #instability #physics #science #surfaceTension #turbulence

Simulating a Sneeze

Sneezing and coughing can spread pathogens both through large droplets and through tiny, airborne aerosols. Understanding how the nasal cavity shapes the aerosol cloud a sneeze produces is critical to understanding and predicting how viruses could spread. Toward that end, researchers built a “sneeze simulator” based on the upper respiratory system’s geometry. With their simulator, the team mimicked violent exhalations both with the nostrils open and closed — to see how that changed the shape of the aerosol cloud produced.

The researchers found that closed nostrils produced a cloud that moved away along a 18 degree downward tilt, whereas an open-nostril cloud followed a 30-degree downward slope. That means having the nostrils open reduces the horizontal spread of a cloud while increasing its vertical spread. Depending on the background flow that will affect which parts of a cloud get spread to people nearby. (Image and research credit: N. Catalán et al.; via Physics World)

#aerosols #biology #coughing #COVID19 #diseaseTransmission #droplets #flowVisualization #fluidDynamics #physics #science #sneezing #turbulence

#Distinction 🏆| L'académie des sciences récompense Laurent Chevillard. Il reçoit le prix Servant 2024. Félicitations!
Laurent développe des modèles de la #turbulence des #fluides, observée dans les expériences et les simulations des équations de Navier-Stokes. Bénéficiant d’un tissu collaboratif étoffé, il a construit des champs aléatoires qui rendent compte de la structure statistique fine de ces écoulements, et a proposé une dynamique stochastique simplifiée permettant de les réaliser.