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

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...

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
--
https://www.ed.ac.uk/news/2024/ocean-waves-soar-beyond-known-limits-study-finds <-- shared technical article
--
https://doi.org/10.1038/s41586-024-07886-z <-- shared paper
--
#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

https://sete-moulis-cnrs.fr/fr

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

https://pubs.aip.org/physicstoday/article/77/5/30/3283589/The-real-butterfly-effect-and-maggoty-applesEven

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!

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

Scientists Have Made a Discovery That Could Change Our Understanding of the Universe
Scientists have revealed that fundamental constants, previously thought to be unchanging, have a range where they can vary. This variability is pivotal for maintaining the necessary viscosity for life processes within cells.
https://scitechdaily.com/scientists-have-made-a-discovery-that-could-change-our-understanding-of-the-universe/ #physics #FluidMechanics #fundamental #constants #variability

Time for a re- #introduction

#FluidDyn is an educational / research project to advance the field of #FluidMechanics through computational, experimental and data processing methods. The motivation behind this project is given here:

https://fluiddyn.readthedocs.io/en/latest/intro-motivations.html

We develop primarily in #Python and are also proponents of #OpenScience philosophy. Follow us for updates about our project & also tangentially related exciting developments in the scientific stack of Python.

Urban waterfalls in #Norrköping

https://tube.tchncs.de/videos/watch/7919a355-a837-4271-88fc-1e180acac228

We published 10 new volumes of the Annual Reviews journals in January 2023 but something about them is different...

...they are all Open Access!

Here are the journal names:

#Criminology
#Entomology
#FluidMechanics
#Linguistics
#MarineScience
#Medicine
#OrganizationalPsychology
#Pathology
#Pharmacology #Toxicology
#Psychology

Enjoy and share far and wide.

Switched to dice.camp in the hope to get a more relevant local timeline. So let's do a #reintroduction:
#introduction #newhere #neuhier.

I like
#warhammer especially #wfrp #wfrp4e #ttrpg, #foundryvtt, also #warhammer40k, #pcgaming and #boardgaming

#landscape #LandscapePhotography, my native #blackforest

my #roughcollie Monty

my latest hobby, #electricguitars with music from #folkpunk to #nwobhm to #melodicdeathmetal

other timesinks: #iobroker, #pixel6a #pixelphone, #fluidmechanics

I'm new to Mastodon, so here's my #introduction!

I'm Sophie (she/her), a 1st-year PhD student at #Stanford in the Civil & Environmental Engineering Department. I'm working on #flume experiments to investigate the effect of stress history on erodible beds. I'm broadly interested in #Geomorphology #Rivers #Sediment #SedimentTransport and #FluidMechanics

I'm originally from #Philly (#GoBirds ), but now I enjoy #hiking #backpacking and #exploring the Bay Area!