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#shockwave — Public Fediverse posts

Live and recent posts from across the Fediverse tagged #shockwave, aggregated by home.social.

  1. Richtmyer-Meshkov Instability

    If you send a shock wave through a magnetized plasma–something that happens in both supernova explosions and inertial confinement fusion–it can trigger an instability known as the Richtmyer-Meshkov instability. The image above shows a form of this, taken from a simulation. Rather than treating the plasma as a single idealized fluid, the researchers represented it as two fluids: an ion fluid and an electron fluid. This allowed them to better capture what happens when certain components of the plasma react to changes faster than others do.

    The image itself shows the electron number density across the fluid, where darker colors represent higher electron number density. The interface between high and low-densities shows a roll-up instability that resembles the Kelvin-Helmholtz instability, but there are also regions of mushroom-like plumes that more closely resemble Rayleigh-Taylor instabilities.

    The authors note that these structures don’t appear in simulations that represent a plasma as a single fluid; you need the two-fluid representation to see them. (Image and research credit: O. Thompson et al.)

    #CFD #computationalFluidDynamics #fluidDynamics #instability #KelvinHelmholtzInstability #magnetohydrodynamics #numericalSimulation #physics #plasma #RayleighTaylorInstability #RichtmyerMeshkovInstability #science #shockwave
  2. A Supernova in Motion

    In 1604, astronomers first caught sight of Kepler’s Supernova Remnant, a massive explosion some 17,000 light-years away. Twenty-five years of observations from the Chandra X-ray Observatory went into making this timelapse, which shows the supernova remnant‘s material pushing into the surrounding gas and dust.

    In its fastest regions, the supernova remnant is moving around 2% of the speed of light–some 22 million kilometers per hour. Slower parts of the remnant are moving at just 0.5% of light-speed. (Image credit: NASA/CXC/SAO/Pan-STARRS; via Gizmodo)

    #astrophysics #compressibleFlow #flowVisualization #fluidDynamics #physics #science #shockwave #supernova #turbulence
  3. The Best of FYFD 2025

    Happy 2026! This will be a big year for me. I’ll be finishing up and turning in the manuscript for my first book — which flows between cutting edge research, scientists’ stories, and the societal impacts of fluid physics. It’s a culmination of 15 years of FYFD, rendered into narrative. I’m so excited to share it with you when it’s published in 2027.

    As always, though, we’ll kick off the year with a look back at some of FYFD’s most popular posts of 2025. (You can find previous editions, too, for 2024, 202320222021202020192018201720162015, and 2014.) Without further ado, here they are:

    • Charged Drops Don’t Splash
    • Strata of Starlings
    • Espresso in Slow-Mo
    • The Incredible Engineering of the Alhambra
    • Uranus Emits More Than Thought1
    • Kolmogorov Turbulence
    • Bow Shock Instability
    • How Particles Affect Melting Ice
    • The Puquios System of Nazca
    • Cooling Tower Demolition
    • A Glimpse of the Solar Wind
    • Bubbling Up
    • A Sprite From Orbit
    • Cornflower Roots Growing
    • How Sunflowers Follow the Sun

    What a great bunch of topics! I’m especially happy to see so many research and research-adjacent posts were popular. And a couple of history-related posts; I don’t write those too often, but I love them for showing just how wide-ranging fluid physics can be.

    Interested in keeping up with FYFD in 2026? There are lots of ways to follow along so that you don’t miss a post.

    And if you enjoy FYFD, please remember that it’s a reader-supported website. I don’t run ads, and it’s been years since my last sponsored post. You can help support the site by becoming a patronbuying some merch, or simply by sharing on social media. And if you find yourself struggling to remember to check the website, remember you can get FYFD in your inbox every two weeks with our newsletter. Happy New Year!

    (Image credits: droplet – F. Yu et al., starlings – K. Cooper, espresso – YouTube/skunkay, fountain – Primal Space, Uranus – NASA, turbulence – C. Amores and M. Graham, capsule – A. Álvarez and A. Lozano-Duran, melting ice – S. Bootsma et al., puquios – Wikimedia, cooling towers – BBC, solar wind – NASA/APL/NRL, Lake Baikal – K. Makeeva, sprite – NASA, roots – W. van Egmond, sunflowers – Deep Look)

    1. I know what I did. ↩︎
    #biology #bowShock #espresso #flowVisualization #fluidDynamics #fluidsAsArt #history #ice #melting #physics #plants #science #shockwave #solarWind #splashes #sprite #turbulence #Uranus
  4. Veil Nebula

    These glowing wisps are the visible remains of a star that went supernova about 7,000 years ago. Today the supernova remnant is known as the Veil Nebula and is visible only through telescopes. In the image, red marks hydrogen gas and blue marks oxygen. First carried by shock waves, these remains of a former star now serve as seed material for other stars and planetary systems to form. (Image credit: A. Alharbi; via APOD)

    #astrophysics #fluidDynamics #physics #science #shockwave #stellarEvolution #supernova #turbulence

  5. The Federal Statistical Office (Destatis) has confirmed an inflation rate of 2.0 percent for June 2025, mirroring a preliminary estimate released at the end of... news.osna.fm/?p=7215 | #news #economy #inflation #rattles #shockwave

  6. Bow Shock Instability

    There are few flows more violent than planetary re-entry. Crossing a shock wave is always violent; it forces a sudden jump in density, temperature, and pressure. But at re-entry speeds this shock wave is so strong the density can jump by a factor of 13 or more, and the temperature increase is high enough that it literally rips air molecules apart into plasma.

    Here, researchers show a numerical simulation of flow around a space capsule moving at Mach 28. The transition through the capsule’s bow shock is so violent that within a few milliseconds, all of the flow behind the shock wave is turbulent. Because turbulence is so good at mixing, this carries hot plasma closer to the capsule’s surface, causing the high temperatures visible in reds and yellows in the image. Also shown — in shades of gray — is the vorticity magnitude of flow around the capsule. (Image credit: A. Álvarez and A. Lozano-Duran)

    #2024gofm #CFD #computationalFluidDynamics #flowVisualization #fluidDynamics #hypersonic #instability #numericalSimulation #physics #science #shockWave #turbulence

  7. Interstellar Jets

    This JWST image shows a couple of Herbig-Hero objects, seen in infrared. These bright objects form when jets of fast-moving energetic particles are expelled from the poles of a newborn star. Those particles hit pockets of gas and dust, forming glowing, hot shock waves like those seen here in red. The star that birthed the object is out of view to the lower-right. The bright blue light surrounded by red spirals that sits near the tip of the shock waves is actually a distant spiral galaxy that happens to be aligned with our viewpoint. (Image credit: NASA/ESA/CSA/STScI/JWST; via APOD)

    #astrophysics #fluidDynamics #jets #physics #science #shockwave #stellarEvolution

  8. DATE: April 10, 2025 at 08:30AM
    SOURCE: BioWorld MedTech

    Direct article link at end of text block below.

    .@FDADeviceInfo clears path for @bostonsci ’s Bolt #IVL to challenge @JNJNews ’s #Shockwave

    t.co/O6j89U4Xwn

    #medtech

    Here are any URLs found in the article text:

    t.co/O6j89U4Xwn

    #medtech

    Articles can be found by scrolling down the page at bioworld.com/topics/85-bioworl .

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  9. DATE: April 09, 2025 at 07:00PM
    SOURCE: BioWorld MedTech

    Direct article link at end of text block below.

    .@FDADeviceInfo clears path for @bostonsci ’s Bolt #IVL to challenge @JNJNews ’s #Shockwave

    t.co/O6j89U4pGP

    #medtech

    Here are any URLs found in the article text:

    t.co/O6j89U4pGP

    #medtech

    Articles can be found by scrolling down the page at bioworld.com/topics/85-bioworl .

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    NYU Information for Practice puts out 400-500 good quality health-related research posts per week but its too much for many people, so that bot is limited to just subscribers. You can read it or subscribe at @PsychResearchBot
    .
    Since 1991 The National Psychologist has focused on keeping practicing psychologists current with news, information and items of interest. Check them out for more free articles, resources, and subscription information: nationalpsychologist.com
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    EMAIL DAILY DIGEST OF RSS FEEDS -- SUBSCRIBE:
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