i like shock waves
Munich
Joined November 2021
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Ernst Mach retweeted
Polygon patterns of convection form when liquid nitrogen is poured into a warm beaker. This work, by Alexis Duchesne et al at TU Denmark, was a winner of the 2018 #GalleryOfFluidMotion. The full video is at go.aps.org/3Q5a4oR #FluidDynamics #FBF #Physics #Chaos
Ernst Mach retweeted
This is very cool! You just know I am going to show this on opening day in my grad fluids class 2.25 this Fall! 🌊 ✈️ 🚀 – at Acton, MA
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Ernst Mach retweeted
Our latest prediction for #CZ5B rocket body reentry is:
🚀30 Jul 2022 17:24 UTC ± 1 hour
Reentry will be along one of the ground tracks shown here. It is still too early to determine a meaningful debris footprint. Follow this page for updates: aerospace.org/reentries/cz-5…
Ernst Mach retweeted
Or reach out to the authors for a preprint:
researchgate.net/publication…
Ernst Mach retweeted
Alas, link generate by website for the paper doesn't appear to work. Better link—as always—is DOI:
doi.org/10.1017/jfm.2022.581
Ernst Mach retweeted
20 years ago, I started to work with my students on the problem of detonations propagating into inhomogeneous media. This new paper by Aslan Kasimov in @JFluidMech reveals a richer dynamics than we ever imagined:
Arnold tongues and devil's staircases bit.ly/3cSjhCP
Ernst Mach retweeted
I did it 🥹
ALT A screenshot of Emily’s profile on TikTok that shows that she has 1 million followers
Ernst Mach retweeted
#DailyMechanician Gury Vasilievich Kolosov headed the theoretical mechanics dept. at St. Petersburg Univ. in early 20th century & was an early proponent of utilizing complex potential. A material constant used for brevity of plane elasticity solution is fittingly named after him.
Ernst Mach retweeted
THIS IS NOT A SONIC BOOM
Okay folks, it’s been long enough. Time to finally address the biggest point of confusion on #AvGeek twitter: what exactly is going on with vapor cones?
Let’s just say much of what you’ve read is (probably) wrong. Wonder no more: a thread... 1/n
Ernst Mach retweeted
@PhysRevFluids is this an lonely APS-DFD duck????
RUBBER DUCKY ALERT🐤🐤🐤🐤🐤🐤🐤🐤: Stuart Laurence's group at @UofMaryland produces some of the highest quality #schlieren data I have seen. He might be taking requests. Email at [email protected]. Funded in part by @NSF.
Ernst Mach retweeted
The model size they were using is very small, so the relative size of the boundary layer is very large compared to the model size. But I like this solution because it's like Method of Images in real life. Supersonic ground effect is indeed a complex problem!!
Ernst Mach retweeted
To the U.S. `I have a PhD’ in high-speed aerodynamics community, underestimating the capability of foreign powers is foolish.
Ernst Mach retweeted
Equations are destroying our youth...keep them out of your powerpoint presentations
Ernst Mach retweeted
Huh??? “The challenges of hypersonic flight aren’t different from those of lower supersonic flight, they’re just way worse.”
Hypersonic BLs ARE sensitive to different disturbances compared to their subsonic and moderate-supersonic counterparts.
annualreviews.org/doi/abs/10…
Hypersonic is an often misunderstood word, and for good reason. Achieving hypersonic speeds is tough, but it's not all that special... and it certainly isn't new.
sandboxx.us/blog/its-a-myth-…
Ernst Mach retweeted
Exponential growth??? really????
"The air resistance experienced by a vehicle increases in proportion to its velocity squared. This means that as the speed of the vehicle increases, the pressure and friction its subjected to don’t increase gradually, but exponentially."
Hypersonic is an often misunderstood word, and for good reason. Achieving hypersonic speeds is tough, but it's not all that special... and it certainly isn't new.
sandboxx.us/blog/its-a-myth-…
Ernst Mach retweeted
Like @DrChrisCombs, I noticed that @TrevorMahlmann's photo had faint evidence of acoustic radiation. With apologies to Trevor for butchering his photo, I took several examples where the wave propagation angle was fairly clear from the edge of the sun's distortion... 1/4
With just two hours notice of a new launch T-0, captured @SpaceX’s Falcon 9 transiting the Sun this morning in Florida☀️🚀
settings⚙️/download⬇️/print🖼 of this photo: tmahlmann.com/photos/Rockets…
Ernst Mach retweeted
For more information related to the growth condensation clouds and shock wave dynamics see cambridge.org/core/journals/…
#shocks #compressible #highspeed #Aerospace
Ernst Mach retweeted
The paper mentioned above this provides video analysis of youtube.com/watch?v=gWGLAAYd….
