In #FluidMechanics, things like #SurfaceWaves are often modelled using #LinearEquations, which give rise to phenomena such as the principle of #LinearSuperposition, where you can take two or more distinct solutions and simply add them together to get a new solution. Solutions are also periodic and can be decomposed into sinusoidal functions.
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An Article in the Annual Review of Condensed Matter Physics on Turbulence by KR Sreenivasan and J Schumacher
https://www.annualreviews.org/content/journals/10.1146/annurev-conmatphys-031620-095842
What is the turbulence problem, and when can we say it’s solved? 
This deep dive by Sreenivasan & Schumacher explores the math, physics, and engineering challenges of turbulence—from Navier-Stokes equations to intermittency and beyond. A must-read for anyone fascinated by chaos, complexity, and the unsolved mysteries of fluid dynamics! 
A summary of the talk presented by KR Sreenivasan in December 2023 at the International Center for Theoretical Sciences (ICTS-TIFR) in Bengaluru, as part of a program on field theory and turbulence.
https://www.youtube.com/watch?v=fwVSBYh-KC4
"Field Theory and Turbulence" program link: https://www.icts.res.in/discussion-meeting/ftt
#FluidDynamics #Physics #NavierStokes #UnsolvedMystery #Mechanics #Dynamics #FluidMechanics #Science #Chaos #TurbulentMotion #Randomness #Chaotic #Fluid #ClassicalMechanics
#Turbulence
Low-Resolution Fluid Simulation On An ESP32 - Fluid simulations are a key tool in fields from aerospace to motorsports and even ... - https://hackaday.com/2025/02/28/low-resolution-fluid-simulation-on-an-esp32/ #microcontrollers #fluidmechanics #simulation #liquid #esp32 #gas
The annual “VKI PhD Symposium" is currently taking place. There is a new tradition to have some keynotes off the beaten track, and today it was about the risks of #AI. Food for thought!
Edit: one of the speakers is here on Mastodon: @SylviaFysica
Happy birthday, Clifford Truesdell! 
> "This paper, whose intent is stated in its title, gives wrong solutions to trivial problems. The basic error, however, is not new." (Mathematical Reviews 1951)
https://mathshistory.st-andrews.ac.uk/Biographies/Truesdell/
https://people.maths.ox.ac.uk/ball/Miscelleaneous%20Articles/truesdell.pdf
Just took a break from my pooter to heave my corpulent meatsack self to my ensuite to belatedly brush my teeth after brekkie. Stooped over my handbasin, doing the doings, i realised that parts of my face were being randomly splashed, so i returned my mind from zooming along the astral plane to consider what might be happening.
Realised that i'd forgotten to turn the cold tap fully off as i began brushing, that the combo of its consequent partial valve opening, the cooler than usual day, & the local water pressure today had combined to make the resultant waterflow's #ReynoldsNumber fully turbulent, not laminar. Furthermore, the ensuing randomness of its flow in this mode was such that often it was striking the basin drain grate grills rather than falling cleanly thru the gaps, & was rebounding aka splashing. Finally, my stoop was sufficient that my face happened to be in just the right range to intersect with this mild local splashing.
These contemplative revelations pleased me. It was a nice little low-key local demonstration that no matter the pomposity, arrogance, & suicidal determination of the ridiculous human species, the principles of #physics, #thermodynamics, #fluidmechanics, & #chaostheory will always prevail.
But i expect such thoughts regularly cross the minds of most peeps as they do their routine ablutions... 
Microfluidic Motors Could Work Really Well For Tiny Scale Tasks - The vast majority of motors that we care about all stick to a theme. They rely on ... - https://hackaday.com/2024/11/14/microfluidic-motors-could-work-really-well-for-tiny-scale-tasks/ #hackadaycolumns #microhydraulics #fluidmechanics #microfluidics #androidhacks #science #motor
Snuck off to the #DoctorWho exhibition in town before it closes. It was fun, quite sciency actually. Even a little #FluidMechanics .And some great bits n bobs from the show… also my first time inside #Tākina. I’m warming to it.
Ocean Waves Soar Beyond Known Limits
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https://www.ed.ac.uk/news/2024/ocean-waves-soar-beyond-known-limits-study-finds <-- shared technical article
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https://doi.org/10.1038/s41586-024-07886-z <-- shared paper
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#GIS #spatial #mapping #model #modeling #extreme #ocean #waves #mechanics #fluidmechanics #marine #height #steepness #risk #hazard #coast #coastal #design #engineering #parameters #extremeweather #structures #infrastrucure #FloWave #tank #systems #crossing #storm #stormsurge #hurricane #typhoon #climatechange #wind #weather #weatherforecasting #climatemodeling #transport #movement #ecosystems #carbonemissions #spatialanalysis #spatiotemporal #3D #3DAnalysis
Dear fellow physics teachers (especially of continuum-mechanics-related disciplines): do you have any suggestions, thoughts, personal experiences, and references about nice *graphical representations* of the flux of a vector quantity – for instance momentum flux (in momentum transport)?
Cheers!
PS: what tags can be good & appropriate for a request like the present one?
I'm #hiring ! Jose Montoya and I are looking for a PhD student to join our new CNRS-funded project on theoretical & numerical modelling of the spatial and scale-dependency of biodiversity and ecosystems.
Details of project and job description in links below (project is hosted at SETE in Moulis #Ariège, France)
It's a truly interdisciplinary project, so pinging the #ecology #ecoevo #physics #FluidMechanics teams here 
https://francois-rincon.org/misc/ECOSCALES_PhDproject.pdf
https://emploi.cnrs.fr/Offres/Doctorant/UAR2029-SEVBON-048/Default.aspx
Even though the Navier–Stokes equations are deterministic, it seems that you cannot make predictions beyond a fixed time horizon, no matter how small the initial uncertainty. #physics #fluidmechanics
The physics of an 18th-century fire engine - Enlarge / An 18th-century fire engine designed and built by Richard New... - https://arstechnica.com/?p=1997177 #fluidmechanics #fluiddynamics #windkessels #science #history #physics
Much like the world of Hogwarts snd the duality of magic and dark arts, #FluidMechanics also has a dark side.
Good applications ranges from microscale (biofluids, medicine, elerctronics) to earth and space, (where understanding heat, wind, water helps weather forecasting, renewable energy, and transporting sectors)
On the flip side there:
1. shock waves and hypersonic flows, which can be structured as pure studies, but has profound applications in military.
2. fracking: oil and gas!
Study reveals how natural processes helped sculpt the Great Sphinx of Giza - Enlarge / Experiments yield fresh evidence to support controversial hyp... - https://arstechnica.com/?p=1983658 #greatsphinxofgiza #fluidmechanics #fluiddynamics #ancientegypt #science #physics
Good news for clumsy divers: Physics holds the key to less-painful belly flops - Brown researchers set up a belly flop-like water experiment using a ... - https://arstechnica.com/?p=1981301 #air/waterinterface #harmonicoscillator #marineengineering #fluidmechanics #surfacetension #hydrodynamics #bellyflops #science #physics #diving
The physics of saltwater taffy - Enlarge / Saltwater taffy is made by stretching and pulling the sticky ... - https://arstechnica.com/?p=1967089 #viscoelasticmaterials #fluidmechanics #saltwatertaffy #foodscience #chemistry #rheology #science #physics
Ars Technica: The physics of saltwater taffy https://arstechnica.com/?p=1967089 #Tech #arstechnica #IT #Technology #viscoelasticmaterials #fluidmechanics #saltwatertaffy #Foodscience #chemistry #rheology #Science #Physics #science
This fluid, seemingly at rest initially, turns out to be convecting as revealed by a #timelapse movie. #Evaporation cools the fluid at the surface, which makes it a bit heavier than the fluid below, thus #convection ensues, very slowly!
This fluid is #rheoscopic, easy to make at home using shaving cream.
Here's the recipe:
https://pubs.aip.org/aip/pof/article/30/8/087103/938850/Rheoscopic-fluids-in-a-post-Kalliroscope-world
Greg Cocks 
