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Two smoke-filled bubbles merge like living organisms, their thin films flow, equalize pressure, and unite into one perfect sphere. It’s fluid dynamics and surface tension performing physics in real time. Nathaniel Hanks coming in with 52 view video suggestion much appreciated

20,333 次观看 • 10 个月前 •via X (Twitter)

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The fascinating concept of Non-Newtonian fluids, which transition from a liquid state to a solid-like state when pressure is applied, has a rich history that spans several centuries. The study and understanding of these peculiar fluids have evolved over time, leading to a wide range of practical applications and scientific insights. One of the earliest references to Non-Newtonian behavior in fluids dates back to the 17th century when Sir Isaac Newton formulated the basic principles of fluid mechanics. Newton's laws of fluid motion primarily applied to Newtonian fluids, which exhibit constant viscosity and flow behavior regardless of the applied force or pressure. However, it soon became apparent that not all fluids behaved in this predictable manner. In the mid-19th century, a scientist named Thomas Andrews made significant contributions to the understanding of Non-Newtonian fluids. Andrews conducted groundbreaking experiments with carbon dioxide, revealing that under high pressure, this gas could transform into a liquid. This observation marked one of the earliest instances of pressure-induced phase changes in fluids. The term "Non-Newtonian" itself was coined in the 20th century to describe fluids that did not adhere to Newton's classical laws of fluid dynamics. These fluids exhibited a variety of behaviors, but one of the most intriguing was their ability to solidify or increase in viscosity when subjected to stress or pressure. One of the most famous examples of such behavior is cornstarch mixed with water, which forms a substance known as "oobleck" that becomes more solid when pressure is applied. In the modern era, Non-Newtonian fluids have found applications in various fields, including food science, engineering, and material science. They are used in products like quicksand, body armor, and even in the development of impact-resistant materials. One of the key insights that emerged from the study of Non-Newtonian fluids is the importance of understanding the relationship between stress and strain, as well as the influence of time-dependent properties on their behavior. This knowledge has led to advancements in rheology, the study of flow and deformation in materials, and has practical implications in areas such as industrial processing, medicine, and the design of everyday products.

Historic Vids

2,632,800 次观看 • 2 年前

This looks like a simple transparent shock absorber filled with oil. But what you are seeing is one of the most destructive phenomena in fluid engineering. This is cavitation in its true form. The white cloud forming beneath the piston is not foam and it is not air. The oil is literally changing from liquid to vapour at room temperature. When the piston moves rapidly, the oil is forced through tiny passages inside the damper. The fluid velocity increases, the local pressure drops, and if it falls below the oil's vapour pressure, the liquid begins to boil without any increase in temperature. The moment the pressure recovers, those microscopic vapour bubbles collapse almost instantly. And that is where the real damage begins. The destructive forces of cavitation is really not understood well by most. A collapsing cavitation bubble creates shockwaves and high-speed microjets that strike nearby surfaces with enormous local forces. Repeated millions of times, these tiny implosions can slowly eat away hardened metals, destroy precision components and reduce the lifespan of expensive machinery across industries. This same invisible phenomenon is one of the biggest challenges in naval engineering. Ship propellers operating under enormous loads can suffer cavitation erosion, losing efficiency while creating underwater noise. For advanced stealth submarines, that noise can become a major problem because cavitation can reveal their position. Decades of research have gone into specialised propeller designs, pump-jets, surface finishes and hydrodynamic optimisation to delay its formation. The same issues affects hydroelectric turbines that convert the energy of entire rivers into electricity, and industrial pumps that move oil, chemicals and water through critical infrastructure around the world. Perhaps the most remarkable part is that after 4-5 decades of advances in metallurgy, coatings and manufacturing, engineers still cannot simply build a material that is immune to cavitation. The solution is not to make stronger metals forever. It is to understand the fluid dynamics so precisely that cavitation is prevented before in those destructive bubbles ever form.

Ammanichanda

1,188,577 次观看 • 1 个月前

I improved the prompt 👇 { "archetype": "Artistic / Fashion / Conceptual", "duration": "15s", "prompt": { "concept": { "title": "Ink Smoke Art – Kinetic Title Sequence", "description": "Continuous 15s one-take black ink-smoke motion graphics. Five characters form from living smoke on pure white void, each performing a characteristic motion while smoke stays alive. Formation direction alternates every 3s. Characters dissolve smoothly through smoke into the next. Kinetic uppercase text emerges from smoke on the complementary side. Final invitation text at the end. Always fluid, never static.", "duration": "15s", "rhythm_structure": { "0-3s": "[image1] forms right-to-left + characteristic motion, text left", "3-6s": "Morph to [image3] left-to-right + characteristic motion, text right", "6-9s": "Morph to [image2] right-to-left + characteristic motion, text left", "9-12s": "Morph to [image4] left-to-right + characteristic motion, text right", "12-15s": "Morph to [image5] right-to-left + characteristic motion + final invitation text" } }, "camera_direction": { "shot_type": "Strict continuous one-take, locked or micro-drift", "forbidden": ["No cuts", "No teleportation", "No hidden transitions", "No freeze frames"], "camera_journey": "Centered medium-wide on pure white void. Locked or extremely slow drift. All energy from living smoke and character motion." }, "typography": { "allowed_words": [ "INK SMOKE ART", "MOTION GRAPHICS", "MIDJOURNEY + H3", "PROMPTS by TechHalla", "MAKE IT YOURS" ], "treatment": { "not_flat_overlay": true, "required_properties": [ "Formed from dense black smoke particles and tendrils", "Physical volumetric depth", "Smoke occlusion and interaction", "Subtle continuous warping", "Bold uppercase condensed sans-serif", "Kinetic emergence synchronized to morphs and directional flow" ] } }, "visual_style": { "overall": "Black ink-smoke art, ultra high-contrast monochrome, pure white void, volumetric living smoke with dense cores and wispy filaments", "inspired_by": [ "[image1]– exact silhouette, long hair, armor, smoke density", "[image2]– exact suit, gun, coat edges, frontal presence", "[image3]– exact spiky hair, martial pose, wristbands, full-body mass", "[image4]– exact cowl, cape flow, dramatic profile", "[image5]– exact straw hat, back view, coat tails, dynamic stance" ], "color_palette": ["pure black", "deep charcoal smoke", "pure white void"], "materials_and_texture": "Living ink smoke, variable density, continuous filament motion, soft volumetric edges, constant micro-turbulence" }, "motion_language": { "follows_music": false, "core_behavior": "Never static. Smoke always swirls. Characters form while performing characteristic motion. Morphs only through smoke densifying and reforming. Direction alternates every beat. Visible smoke motion in every frame." }, "storyboard": { "total_beats": 5, "beat_duration": "3 seconds each", "beats": [ { "id": "01", "time": "0.0–3.0", "description": "Pure white void. Black smoke enters from right, flows left, coalesces into [image1]. Smoke lives on hair, armor and cloak while figure performs slow head turn and shoulder roll, long hair and cloak billowing as if scanning the horizon. Text “INK SMOKE ART” forms left from arriving tendrils into bold uppercase interacting with smoke. End of beat: form smoothly dissolves into swirling smoke." }, { "id": "02", "time": "3.0–6.0", "description": "Smoke reverses, enters from left, flows right, reforms into [image3]. Smoke swirls on limbs and spiky hair while figure performs slight crouch into charged fighting stance, fists clenching, body vibrating with residual energy. Previous text dissolves; “MOTION GRAPHICS” emerges right from arriving smoke into bold uppercase. End of beat: form smoothly dissolves into smoke." }, { "id": "03", "time": "6.0–9.0", "description": "Smoke reverses, enters from right, flows left, reforms into [image32. Smoke lives on suit edges and coat while figure performs slow raise of gun-holding arm into low ready position, coat flaring, determined forward lean. Text “MIDJOURNEY + H3” forms left from rising particles into bold uppercase. End of beat: form smoothly dissolves into smoke." }, { "id": "04", "time": "9.0–12.0", "description": "Smoke reverses, enters from left, flows right, reforms into [image4]. Smoke billows on long cape while figure performs dramatic cape sweep and subtle crouch, head tilting under cowl as if listening. Text “PROMPTS by TechHalla” emerges right from trailing cape smoke into bold uppercase. End of beat: form smoothly dissolves into smoke." }, { "id": "05", "time": "12.0–15.0", "description": "Smoke reverses, enters from right, flows left, reforms into [image5]. Smoke rises and trails on coat tails and hat while figure performs confident stance shift, straw hat tilting, coat tails whipping backward, one arm slightly extending forward. Previous text dissolves; residual smoke briefly reforms titles, then “MAKE IT YOURS” emerges centered from final smoke into bold uppercase as smoke slowly dissipates into white void, never fully static until end frame." } ] } } } Check out the previous one along with the Midjourney prompt for the images!

TechHalla

167,933 次观看 • 4 天前

This is cavitation inside a piston diaphragm pump. Most engineers spend their entire careers hearing this destructive phenomenon. Almost none ever get to see it with their own eyes. When pressure drops below a critical threshold, liquid instantly flashes into vapor, creating thousands of microscopic bubbles throughout the system. It happens in milliseconds, invisible to the naked eye in standard metal pumps. But when pressure rises again, those bubbles don't just disappear quietly. They collapse violently, sending shockwaves rippling through the metal components. The result is catastrophic. Valves get destroyed. Seals get shredded. Pump chambers get hollowed out from the inside, one microscopic implosion at a time. Cavitation is one of the most destructive forces in industrial fluid systems, responsible for equipment failures that cost thousands of dollars per incident. Engineers have studied it for decades through sensors, pressure readings, and the telltale sounds it makes. But they've never been able to watch it happen in real time. Until now. The clear plexiglass head on this LEWA pump changes everything. For the first time, pump engineers can observe cavitation as it occurs, watching the bubble formation and violent collapse that destroys their equipment. It's like finally seeing the invisible enemy that's been wreaking havoc on industrial systems. This is what happens when engineering innovation meets visualization technology. Sometimes the most powerful breakthroughs come from simply making the invisible visible.

Mechanical Knowledge

523,057 次观看 • 2 个月前

This week is already so hot. 🔥 Massive release from Decart : Lucy 2.0 a World Editing Model running at 1080p, 30FPS in realtime. This is truly exciting, the era of real-time generative reality is here. We are moving from watching AI video to living inside AI video. A breakthrough model capable of transforming the visual world in real-time. Moving beyond offline rendering, Lucy 2.0 delivers high-fidelity 1080p video generation with near-zero latency. Lucy 2.0 literally "redraws" the entire world pixel-by-pixel, while you are watching it. e.g. If you want to be an anime character, it doesn't just put a mask on you. It turns your skin into anime skin, your hair into anime hair, and the lighting in your room into anime lighting. Lucy 2.0 is also trained to stop the generated video from slowly falling apart over time, so the same stream can run much longer without faces and details drifting. So why is this a "Massive Deal"? Traditional AI video-generation model takes a prompt, you wait 10–20 minutes, and the computer "bakes" a video for you. You couldn't touch it or change it while it was happening. But Lucy 2.0 works like a mirror. It happens in real-time (30 frames per second). There is no waiting. You move your hand, the AI character moves its hand instantly. The craziest part isn't the visuals; it's the physics. Usually, AI hallucinations are glitchy—hands merge into faces, walls melt. Lucy 2.0 understands how the world works without being told. It knows that if you take off a helmet, there is hair underneath. It knows that if you splash water, droplets fly. It learned "physics" just by watching millions of videos. The physical behavior you see emerges from learned visual dynamics, not from engineered geometry or explicit physics engines. Their official technical report explicitly states that the model does not use traditional 3D engines, depth maps, or wireframes. It is a "pure diffusion model."

Rohan Paul

12,761 次观看 • 7 个月前

Two weeks ago I fixed one of my teeth with algorithms I wrote a couple of years ago! I got hooked by 3D scanning when I started to work for a software shop in Zurich that was programming 3D computational geometry algorithms for denture scanning to produce crowns (and more). Back then, a typical reconstruction pipeline was like: scan the patient’s teeth using an intraoral scanner, reconstruct the surface mesh, design the restoration digitally, and finally mill the crown out of ceramic. We were working mostly with point clouds and meshes, but it wasn’t just math, it was craftsmanship translated into a digital process. Every micron mattered. You could literally see how a good algorithm meant a better fit in someone’s mouth. Gaussian Splatting isn’t about surface reconstruction, it’s about appearance reconstruction. It doesn’t care about explicit topology, it captures how light interacts with the scene. In a sense, it’s the opposite philosophy of the dental world: instead of modeling what the object is, it models how the object looks. 3D Gaussian Splatting enables applications like training self driving cars, teaching robots to understand their environment, creating virtual worlds, or monitoring real sites. It represents scenes as millions of small Gaussians rendered in real time without the need for meshes or textures. Coming from a world where precision geometry was everything, this shift felt natural. It’s still about reconstruction, but with a different goal: not manufacturing a perfect object, but reproducing how the world actually looks. Two weeks ago I got my first dental crown, made with the same software, reconstruction algorithms, and Swiss precision I once helped develop. I haven’t worked there in two years, but sitting in that chair and seeing the process from the other side was a proud moment. It reminded me why I love this field.

MrNeRF

290,202 次观看 • 9 个月前

If you think OpenAI Sora is a creative toy like DALLE, ... think again. Sora is a data-driven physics engine. It is a simulation of many worlds, real or fantastical. The simulator learns intricate rendering, "intuitive" physics, long-horizon reasoning, and semantic grounding, all by some denoising and gradient maths. I won't be surprised if Sora is trained on lots of synthetic data using Unreal Engine 5. It has to be! Let's breakdown the following video. Prompt: "Photorealistic closeup video of two pirate ships battling each other as they sail inside a cup of coffee." - The simulator instantiates two exquisite 3D assets: pirate ships with different decorations. Sora has to solve text-to-3D implicitly in its latent space. - The 3D objects are consistently animated as they sail and avoid each other's paths. - Fluid dynamics of the coffee, even the foams that form around the ships. Fluid simulation is an entire sub-field of computer graphics, which traditionally requires very complex algorithms and equations. - Photorealism, almost like rendering with raytracing. - The simulator takes into account the small size of the cup compared to oceans, and applies tilt-shift photography to give a "minuscule" vibe. - The semantics of the scene does not exist in the real world, but the engine still implements the correct physical rules that we expect. Next up: add more modalities and conditioning, then we have a full data-driven UE that will replace all the hand-engineered graphics pipelines.

Jim Fan

6,183,111 次观看 • 2 年前

🚨This is NOT AI… and it’s not a trick. What you’re seeing over Fairbanks, Alaska is real aurora physics and real atmospheric chemistry… working together with precision. A solar blast hit Earth’s magnetic field… Charged particles got funneled straight into the upper atmosphere… And then the chemistry took over. Here’s what’s actually happening at the atomic level: Oxygen atoms get excited by incoming electrons… When they relax, they emit light at specific wavelengths: Green (557.7 nm)… lower altitude oxygen Deep red (630.0 nm)… higher altitude oxygen Nitrogen molecules behave differently: Excited N₂ and N₂⁺ emit pink, magenta, and purple tones… That only shows up when the էնergy input is strong… like during a geomagnetic storm. Those “angel wings” people keep talking about? Not symbolic… not mystical… it’s field-aligned plasma physics. Earth’s magnetic field channels particles into vertical sheets… Those sheets form curtains… And when symmetry lines up, your brain interprets structure. That’s called pattern recognition… not deception. Multiple observers captured the same formation… same time… same region… And identical events have been documented before, including in Tromsø. People call it fake for one reason: It looks too perfect. But this is what happens when solar էնergy… electromagnetic force… and atmospheric chemistry all lock in. No filters. No CGI. No AI. Just God’s creation… written in physics… expressed through chemistry… and revealed in light. #SilentMajoritySpeaks #AStoneGroove

A Gene Robinson

233,569 次观看 • 4 个月前

Grok Imagine Video 1.5真的要吹爆,这么便宜还这么好用,一键复刻权力的游戏! 我刚充的6000多块的seedance会员算什么🥹 Prompt: Faithfully animate this reference image into a breathtaking cinematic 10-12 second video in the exact visual style of HBO Game of Thrones and House of the Dragon epic dragon sequences. Maintain perfect consistency with the reference image — Daenerys' appearance, Drogon's anatomy, scales, wing structure, and initial lighting. Drogon flies at high speed low over King's Landing rooftops with powerful, realistic wing flaps and body undulation. Massive turbulent fire breath erupts from its jaws, flames reacting dynamically to wind and movement with realistic fluid physics, glowing embers flying backward, intense heat distortion and light bloom. Fire dramatically illuminates the ancient stone buildings and Red Keep from below with shifting warm highlights and deep shadows. Daenerys leans forward with commanding posture, her silver hair and heavy cloak whipping violently in the high-speed wind with realistic fabric dynamics and inertia. Subtle sparks and ash particles in the air. Camera: Dynamic low-angle cinematic tracking shot that follows Drogon from a slightly behind and side position, moving at high speed with the dragon. The camera subtly rises and banks with the dragon's movement, creating a powerful sense of speed, scale and immersion. Sweeping, fluid camera motion with slight handheld energy mixed with controlled cinematic precision. Physics: Highly realistic dragon wing membrane flexing and catching the wind, individual wing fingers moving naturally, heavy cloak and hair with authentic weight and turbulence, fire behaving with real fluid dynamics and interaction with air movement. Lighting & atmosphere: Dragon fire provides the primary moving light source, dramatically lighting the city architecture from below. Volumetric smoke, embers and heat haze. Epic atmospheric depth with slight haze over the city. Native synchronized audio: Deep powerful dragon roar mixed with the roaring whoosh of intense fire, strong wind rush, and distant city ambience with natural reverb. Photorealistic rendering, coherent motion, intricate detail, no artifacts, shot with ARRI Alexa-level fidelity. Masterpiece, maximum epic scale, speed, and cinematic impact.

AYi

14,887 次观看 • 2 个月前

d’Alembert’s Paradox: ν → 0 Is Not ν = 0 In 1752, Jean-le-Rond d’Alembert proved a result that still trips people up: An inviscid, incompressible, steady flow exerts zero drag on a body. No wake. No resistance. The equations let the fluid slip past as if the object weren’t there. The first animation shows exactly that world. The flow is ideal Euler flow. Streamlines bend around the body, accelerate, slow down, then recombine perfectly downstream. Nothing is left behind. The motion you see comes from pathlines moving through a steady velocity field, not from any evolving structure in the flow itself. The setup is the ideal fluid model: Euler (ν = 0) ρ(∂u/∂t + (u·∇)u) = −∇p ∇·u = 0 Assume steady flow and zero viscosity and the picture locks in. If the flow is also irrotational, ∇×u = 0, you can write u = ∇φ and the problem collapses to potential flow: ∇²φ = 0 u = ∇φ The force on the body comes entirely from pressure: F = −∮ p n dS D = F·eₓ Under these assumptions the pressure field is perfectly front–back symmetric, so the integral gives D = 0 That’s the paradox. Not a small correction. Zero. Now look at the second animation. This is the same geometry and the same inflow, but with viscosity turned on, even if it’s only a small amount. Navier–Stokes (ν > 0) ρ(∂u/∂t + (u·∇)u) = −∇p + μ∇²u ∇·u = 0 That extra term changes everything. A thin boundary layer forms near the surface. Separation becomes possible. Vorticity is generated and shed. A wake appears. Drag is no longer optional. The contrast is the point. Letting viscosity go to zero is not the same thing as setting it to zero. The inviscid limit deletes the mechanism that breaks time-reversal symmetry and allows energy dissipation. Once that mechanism is gone, wakes can’t exist, and drag vanishes by construction. #FluidDynamics #NavierStokes #EulerEquations #DAlembertParadox #BoundaryLayer #Physics

Mathelirium

27,053 次观看 • 6 个月前

When ATEEZ first stepped onto the stage in October 2018, they were eight boys with a dream that seemed far too big for their small beginnings. No one could have guessed that these wide-eyed rookies from a relatively unknown company, KQ Entertainment, would grow into one of K-pop’s most inspiring success stories. From the very beginning, ATEEZ weren’t chasing fame; they were chasing meaning, and the chance to make their voices heard. Before they were performing on global stages, they were just trainees practicing until sunrise, sharing late-night meals, and holding onto faith that someday, someone would notice them. They weren’t born into luxury or fame; they built everything with their own hands. Their journey was far from perfect. It was filled with exhaustion, moments of doubt, and nights when giving up must have felt easier than pushing forward. Yet, they kept going. They turned pain into passion and uncertainty into performance. Every stage became their proof that dreams can be real if you fight for them hard enough. Their message has always been deeply human: to keep chasing your dream, even when it feels impossible. They call themselves “the youth who move forward,” but they have become something even greater. They are living proof that ordinary people with extraordinary determination can change their fate. 7 years after that debut, ATEEZ stand on some of the biggest stages in the world, performing for thousands who sing their songs back to them. Despite all the fame, they remain grounded, still those same boys who once practiced in small rooms and endless hope. Happy 7 years ATEEZ 💗 7 YEARS WITH ATEEZ #에이티즈_7주년_항해는_계속된다 #7_years_with_ATEEZ #A_TO_Z ATEEZ(에이티즈)

ATEEZ BASE

56,193 次观看 • 10 个月前