#Particle Dynamics

[here-be-dragons-and-whatnot]

He has fur! Sort of!

I have hit my first serious barrier with Jar Full of Cosmos, and that is the fact that my little laptop just doesn't have enough compute power. Unfortunately it's too laggy to effectively experiment with materials and do a better job grooming--not to mention animation tests. Thankfully, I have new PC components on the way. In other good news, the fur system obscures pretty much all my bad mesh deformations. It also obscures his facial movements, but I planned for that and intend to do most of his emoting with ear and eye movements. Next time I make an animal, I think I'll use shapekeys instead of bones for facial animation.

The groom holds up from afar (and with lower resolutions) but up close it needs a lot more work. It's also worth noting that I am using the old particle system because the geometry nodes still feel too confusing, and apparently they can't be animated.

[mexicanistnet]

EHT's global collaboration unveils magnetic fields and particle dynamics around M87* black hole using circular polarization. This breakthrough sheds light on matter consumption and jet formation, showcasing the consortium's pivotal role in unraveling cosmic mysteries.

[fuckyeahfluiddynamics]

Bigger Particles Slide Farther

Mudslides and avalanches typically carry debris of many shapes and sizes. To understand how debris size affects flows like these, researchers use simplified, laboratory-scale experiments like this one.  (Video and image credit: S. Burnett et al.) Read the full article

[maukiki1]

I havent posted mfb art in a while xd hes getting revenge for that one time they squished him

Drawing without the dumbass caption

[batsplat]

“og 4 aliens very particular vibe in being ‘three distinct flavours of socially awkward loner and also valentino rossi’” LMAO I WAS JUST THINKING THIS!!!!!! That he has the funniest possible 3 foils in that era bc like…those three guys could not be less his vibe ~personality wise if they tried. And actually tbf I do think they WERE trying a lot of the time. Feeling very curious if you think there’s anything to the idea of how Marc was the first alien-era rival he had who was more on his level all around? Like early days Marc was kind of just 😀😀😀 all the time but I do think he can be v charming and is clearly extroverted as hell (tho like…notably also a loner but like…not by choice??). Like idk where im going w this but the contrast is interesting to me. IDK

to some extent! I'm not sure I'd necessarily call marc an extrovert, you can be charismatic and cheerful without being an extrovert - but also this is splitting hairs. the og four aliens are one guy who's on the 'roughly as extroverted as you can possibly get as a professional athlete' end of the spectrum and three guys who are on the 'roughly as introverted as you can possibly get as a professional athlete' end. now, tbh, I don't think valentino massively minded this. he's extroverted but crucially he's also got enough charm going for him that he could get his rivals to chat with him if he was so inclined. he had an increasingly friendly relationship with dani, there's real genuine warmth in how both of them talk about each other - ultimately dani might have been quite sullen and withdrawn in general, especially in his early years, but he got on well with valentino. casey and valentino had perfectly decent interpersonal chemistry, they got on well, and tbh they were still warm with each in-person long past the point where that relationship had rhetorically soured. with jorge... I mean, okay, no chemistry there, but that was also very much valentino's choice. I do not fundamentally doubt valentino's ability to charm twenty year old jorge lorenzo. I think just because they were DIFFERENT characters, that doesn't necessarily mean they weren't valentino's *type* personality-wise, like he does seem to be happy enough to be the chatty one who draws them out of their shells in that scenario. unless competitive necessity requires otherwise!! but as marc discovered, somewhat higher levels of extroversion does not protect you if that's the case

I will say I know you do put alien-era as a caveat, but it is still important to point out that marc is very much not the first valentino rival who doesn't fall in the introverted loner camp. valentino had a rival who matched his vibe!! who he had a real proper off-track friendship with, who he went on holidays with, who he had a warm relationship with for substantially longer than the marc/valentino honeymoon lasted. I think you can see the early marc era as a bit of a return to the friendlier vibes of the early noughties, but crucially it is a return. the early noughties was the last gasp before the sport came to be completely dominated by a bunch of young prodigies who had been moulded into perfect athletes and had less chance to grow into people outside of the sport - valentino is already part of that camp in everything but temperament, cf the contrast with biaggi. in the early noughties, he was surrounded by a bunch of older riders who varied dramatically in disposition... biaggi was the guy everyone had issues with, capirossi was always fond of valentino, kr jr he got on well with, he played a mentoring role for in hayden's rookie season... and of course, most importantly, the friendship with sete - now there's an obscenely friendly rivalry right until the very moment when it isn't. 2013-14 is a bit of a return to that more congenial climate, but at the end of the day that lot were still less likely to socialise than riders were back in the day. they just didn't have the time lol

so yeah, I mean. valentino clearly did take to marc on a personal level, and marc is definitely closer to valentino on the introversion/extroversion spectrum than the three other aliens are. though that is also... not difficult. there is something quite funny about how 2006-07 went from valentino's pov. the engine regs changed, valentino literally blinked and suddenly all his opps were toddlers. went from goofing off with capirossi on the sepang 2006 podium to running a daycare centre overnight. and marc is part of that! it's also a massive change in that suddenly, valentino was surrounded by rivals who had been influenced by watching him ride as they grew up and were all really, really, really weird about him. marc with his little bike collection, jorge with his dabbling in pseudoscientific schools of psychology, casey and his championship-winning shirt, dani... well, tbf, I do actually think dani was pretty normal about valentino - probably because he'd known him the longest. had gotten drunk with valentino in the days when the bloke was just an idol and not a god. which is an underrated reason why the dani/valentino relationship never got so weird imo, one that goes beyond competitive calculus - dani was the most capable of interacting with valentino as just another guy. with all three of marc/jorge/casey, that idolisation dynamic does contribute significantly to the interpersonal turmoil

but that's a topic for another day! in conclusion, marc defo the dispositionally cheeriest foil of the alien lot, albeit somewhat by default, and WAS part of the reason why motogp got a bit of a mood lift in that 2013-14 period after what had just been a dire few years vibes-wise. mediocre racing, devastation caused by the financial crisis, tragedy... motogp was feeling quite lifeless in 2011-12 in particular, and those years do have a bit of a drab energy to them. in that sense, what followed was a bit of a reversion to the mean until the vibes completely went off the cliff. have they ever recovered? who can say

[materialsscienceandengineering]

3D-printed particles propel themselves across the surface of a fluid

A small team of physicists at the University of Amsterdam has demonstrated the ability of 3D-printed particles to propel themselves across the surface of a fluid, given the right fuel. The group has posted a paper describing their particles on the arXiv preprint server. Prior research has shown that droplets with a surface tension lower than the surface tension of surrounding fluid will spread rather than mixing, a phenomenon known as the Marangoni effect. A drop of alcohol in a cup of water, for example, will spread across the surface rather than mix with the water and it remains until it evaporates. In this new effort, the research team used this effect to create self-propelling particles. The particles were 3D printed into a shape like a hockey puck—each was approximately 1 centimeter in diameter. The particles were hollow, making them buoyant. The researchers described the hollow part of the puck as a fuel tank into which they poured a small amount of alcohol. They also poked a tiny pinhole in the puck to allow the alcohol to slowly escape when it was placed in a cup of water. Due to the Marangoni effect, the alcohol tried to spread, carrying the puck along with it.

Read more.

[wayti-blog]

"Scientists at the U.S. Department of Energy's (DOE) Brookhaven National Laboratory and collaborators have a new way to use data from high-energy particle smashups to peer inside protons. Their approach uses quantum information science to map out how particle tracks streaming from electron-proton collisions are influenced by quantum entanglement inside the proton.

The results reveal that quarks and gluons, the fundamental building blocks that make up a proton's structure, are subject to so-called quantum entanglement. This quirky phenomenon, famously described by Albert Einstein as "spooky action at a distance," holds that particles can know one another's state—for example, their spin direction—even when they are separated by a great distance.

In this case, entanglement occurs over incredibly short distances—less than one quadrillionth of a meter inside individual protons—and the sharing of information extends over the entire group of quarks and gluons in that proton.

(...), just published in Reports on Progress in Physics, (....)."

continue reading

[tearlessrain]

the most annoying thing is when you’re first learning how to do something and there’s this one step that everyone who’s been doing it for a while thinks is so obvious that they don’t need to explain it so every tutorial has this “draw the rest of the fucking owl” cut and you’re just sitting there like wait a second you did some things between those steps that you did Not mention

[tearlessrainart]

it was done with an extremely basic rig for the sole purpose of messing with/testing particle hair dynamics (I still do not understand how particle hair works) but I'm weirdly proud of this little piaffe animation

because yeah the fathier model is still a thing

[namazunomegami]

“Kindly consider the question: what would your good do if evil did not exist, and what would the earth look like if shadows disappeared from it? Shadows are cast by objects and people. Here is the shadow of my sword. Trees and living beings also have shadows. Do you want to skin the whole earth, tearing all the trees and living things off it, because of your fantasy of enjoying bare light? You’re a fool.” - The Master and Margarita

[strwbi-laces]

AAAAH one more exam left and then im freeee

[here-be-dragons-and-whatnot]

I'm taking a break from character modeling to play around with smokey, explode-y simulations. Here are a couple contenders with various perimeters tweaked. I appreciate the absurd violence of the first one.

[fuckyeahfluiddynamics]

"There is a crack in everything..."

When millimeter-sized drops of water infused with nanoparticles dry, they leave behind complex and beautiful residues. As water continues evaporating, the residues warp, bend, and crack. (Video and image credit: P. Lilin and I. Bischofberger; submitted by Irmgard B.; see also P. Lilin and I. Bischofberger and P. Lilin et al.) Read the full article

[aesiractive]

This video showcases my third attempt at generating a vortex street behind a NACA 4-digit airfoil. The airfoil is pitched to a nose-up orientation, corresponding to an Angle of Attack (AoA) of 30 degrees. For this iteration, I have improved the rendering of particles by using sprites, making them visually more smooth.

[materialsscienceandengineering]

What Is Brownian Motion? | Properties of Matter | Chemistry | FuseSchool

[whats-in-a-sentence]

Soils¹ compromise a dynamic mixture of five components – minerals, organic matter, water, air, and living organisms.

¹ Soil can be defined as the layer of unconsolidated particles that are derived from weathered rock and organic material, and that contains water and/or air in the void space. Soil covers the upper surface of much of the Earth and supports plant life.

"Environmental Chemistry: A Global Perspective", 4e - Gary W. VanLoon & Stephen J. Duffy