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Nicole SharpVisualizing Unstable Flames <a class="" href="https://fyfluiddynamics.com/wp-content/uploads/thermo_instab1.gif" rel="nofollow noopener noreferrer" target="_blank"></a> <a class="" href="https://fyfluiddynamics.com/wp-content/uploads/thermo_instab2.gif" rel="nofollow noopener noreferrer" target="_blank"></a> <a class="" href="https://fyfluiddynamics.com/wp-content/uploads/thermo_instab3.png" rel="nofollow noopener noreferrer" target="_blank"></a> Inside a combustion chamber, temperature fluctuations can cause sound waves that also disrupt the flow, in turn. This is called a thermoacoustic instability. In this video, researchers explore this process by watching how flames move down a tube. The flame fronts begin in an even curve that flattens out and then develops waves like those on a vibrating pool. Those waves grow bigger and bigger until the flame goes completely turbulent. Visually, it’s mesmerizing. Mathematically, it’s a lovely example of <a href="https://en.wikipedia.org/wiki/Parametric_oscillator" rel="nofollow noopener noreferrer" target="_blank">parametric resonance</a>, where the flame’s instability is fed by system’s natural harmonics. (Video and image credit: <a href="https://doi.org/10.1103/APS.DFD.2024.GFM.V2561866" rel="nofollow noopener noreferrer" target="_blank">J. Delfin et al.</a>; research credit: J. Delfin et al. <a href="https://doi.org/10.1016/j.fuel.2024.132344" rel="nofollow noopener noreferrer" target="_blank">1</a>, <a href="https://doi.org/10.1016/j.proci.2024.105322" rel="nofollow noopener noreferrer" target="_blank">2</a>)<a rel="nofollow noopener noreferrer" class="hashtag u-tag u-category" href="https://fyfluiddynamics.com/tagged/2024gofm/" target="_blank">#2024gofm</a> <a rel="nofollow noopener noreferrer" class="hashtag u-tag u-category" href="https://fyfluiddynamics.com/tagged/combustion/" target="_blank">#combustion</a> <a rel="nofollow noopener noreferrer" class="hashtag u-tag u-category" href="https://fyfluiddynamics.com/tagged/combustion-instability/" target="_blank">#combustionInstability</a> <a rel="nofollow noopener noreferrer" class="hashtag u-tag u-category" href="https://fyfluiddynamics.com/tagged/flame/" target="_blank">#flame</a> <a rel="nofollow noopener noreferrer" class="hashtag u-tag u-category" href="https://fyfluiddynamics.com/tagged/flow-visualization/" target="_blank">#flowVisualization</a> <a rel="nofollow noopener noreferrer" class="hashtag u-tag u-category" href="https://fyfluiddynamics.com/tagged/fluid-dynamics/" target="_blank">#fluidDynamics</a> <a rel="nofollow noopener noreferrer" class="hashtag u-tag u-category" href="https://fyfluiddynamics.com/tagged/instability/" target="_blank">#instability</a> <a rel="nofollow noopener noreferrer" class="hashtag u-tag u-category" href="https://fyfluiddynamics.com/tagged/parametric-resonance/" target="_blank">#parametricResonance</a> <a rel="nofollow noopener noreferrer" class="hashtag u-tag u-category" href="https://fyfluiddynamics.com/tagged/physics/" target="_blank">#physics</a> <a rel="nofollow noopener noreferrer" class="hashtag u-tag u-category" href="https://fyfluiddynamics.com/tagged/resonance/" target="_blank">#resonance</a> <a rel="nofollow noopener noreferrer" class="hashtag u-tag u-category" href="https://fyfluiddynamics.com/tagged/science/" target="_blank">#science</a> <a rel="nofollow noopener noreferrer" class="hashtag u-tag u-category" href="https://fyfluiddynamics.com/tagged/thermoacoustic-instability/" target="_blank">#thermoacousticInstability</a> <a rel="nofollow noopener noreferrer" class="hashtag u-tag u-category" href="https://fyfluiddynamics.com/tagged/turbulence/" target="_blank">#turbulence</a>

Datarainbow Privacy Assistant✅<a href="https://www.vice.com/en/article/burning-ev-batteries-are-delaying-la-wildfire-clean-up/" rel="nofollow noopener noreferrer" translate="no" target="_blank">https://www.vice.com/en/article/burning-ev-batteries-are-delaying-la-wildfire-clean-up/</a> As of October 2024, there were over 431,000 Teslas alone in the Los Angeles area. That’s a lot of EVs outfitted with a lot of lithium-ion batteries that have complicated the fight against LA wildfires. <a href="https://mastodon.online/tags/tesla" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#tesla</a> <a href="https://mastodon.online/tags/ev" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#ev</a> <a href="https://mastodon.online/tags/batteries" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#batteries</a> <a href="https://mastodon.online/tags/combustion" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#combustion</a> <a href="https://mastodon.online/tags/fire" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#fire</a> <a href="https://mastodon.online/tags/toxic" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#toxic</a> <a href="https://mastodon.online/tags/air" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#air</a>

BellingenNSWA combustible world: "Any city can burn now. " 21st-century fires "The intensity of the fire ...burned basically the same way as the ones in LA. You had the drought, you had the fuel, you had the wind and that’s all you need. That can be recreated anywhere in the world. Any city can burn now. ""Don’t look at the fire, look at the wind. If the wind is blowing over you, it means the embers are, too. The fire could be 2 miles away, but if the wind is toward you, the embers are, too, and act accordingly." >> <a href="https://www.theguardian.com/us-news/2025/jan/11/wildfires-los-angeles-climate-crisis-john-vaillant" rel="nofollow noopener noreferrer" translate="no" target="_blank">https://www.theguardian.com/us-news/2025/jan/11/wildfires-los-angeles-climate-crisis-john-vaillant</a>"Fire fuel "used to be thought of as "the bush" leaf litter, grasses, shrubs, trees, in short Australian biodiversity. Now it is also houses, all the stuff and the petrol derived products and infrastructure.Bushfire fuel classification overview >> <a href="https://www.afac.com.au/docs/default-source/burning/bushfire-fuel-classification-overview.pdf?sfvrsn=8&download=false" rel="nofollow noopener noreferrer" translate="no" target="_blank">https://www.afac.com.au/docs/default-source/burning/bushfire-fuel-classification-overview.pdf?sfvrsn=8&download=false</a> <a href="https://mastodon.au/tags/fires" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#fires</a> <a href="https://mastodon.au/tags/bushfires" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#bushfires</a> <a href="https://mastodon.au/tags/Fossilfuels" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Fossilfuels</a> <a href="https://mastodon.au/tags/combustion" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#combustion</a> <a href="https://mastodon.au/tags/wind" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#wind</a> <a href="https://mastodon.au/tags/cars" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#cars</a> <a href="https://mastodon.au/tags/HomoFagrans" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#HomoFagrans</a> <a href="https://mastodon.au/tags/energy" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#energy</a> <a href="https://mastodon.au/tags/petrotopia" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#petrotopia</a> <a href="https://mastodon.au/tags/plastic" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#plastic</a> <a href="https://mastodon.au/tags/housing" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#housing</a> <a href="https://mastodon.au/tags/cities" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#cities</a> <a href="https://mastodon.au/tags/sprawl" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#sprawl</a> <a href="https://mastodon.au/tags/flammable" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#flammable</a> <a href="https://mastodon.au/tags/fuel" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#fuel</a> <a href="https://mastodon.au/tags/chemicals" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#chemicals</a> <a href="https://mastodon.au/tags/trauma" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#trauma</a> <a href="https://mastodon.au/tags/vegetation" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#vegetation</a> <a href="https://mastodon.au/tags/biodiversity" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#biodiversity</a> <a href="https://mastodon.au/tags/TheBush" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#TheBush</a> <a href="https://mastodon.au/tags/HazardReduction" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#HazardReduction</a> <a href="https://mastodon.au/tags/ClimateBreakdown" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#ClimateBreakdown</a>

Kevin Karhan :verified:<a href="https://m6n.io/@fuzzychef" class="u-url mention" rel="nofollow noopener noreferrer" target="_blank">@fuzzychef</a> <a href="https://chaos.social/@isotopp" class="u-url mention" rel="nofollow noopener noreferrer" target="_blank">@isotopp</a> depends...I just think it needs to be marketed at a <a href="https://github.com/kbtechnologies/plv?tab=readme-ov-file#economy" rel="nofollow noopener noreferrer" target="_blank">reasonable price</a> and not solely in €400k+ Supercars!<ul><li>OFC the economies of scale made <a href="https://infosec.space/tags/combustion" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#combustion</a> engines really cheap and affordable...</li></ul>At least it's not like <a href="https://infosec.space/tags/NuclearFusion" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#NuclearFusion</a> where every step comes with at least one or two hurdles that demand basically new materials and techniques to get fundamentally researched so it never got closer than "within 25 years" for 50+ years...

Kevin Karhan :verified:<a href="https://kolektiva.social/@arrrg" class="u-url mention" rel="nofollow noopener noreferrer" target="_blank">@arrrg</a> Cats themselves are an <a href="https://infosec.space/tags/Enshittification" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Enshittification</a> - regardless if <a href="https://infosec.space/tags/electric" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#electric</a> or <a href="https://infosec.space/tags/combustion" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#combustion</a>!<a href="https://www.youtube.com/watch?v=V1kOLhhSjl8" rel="nofollow noopener noreferrer" translate="no" target="_blank">https://www.youtube.com/watch?v=V1kOLhhSjl8</a>The Problem is <a href="https://infosec.space/tags/Capitalism" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Capitalism</a> - rverything else is just a <a href="https://infosec.space/tags/Symptom" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Symptom</a>...

Le Club de MediapartChristian Jaccard. Nouer, brûler Le <a href="https://mediapart.social/tags/Mus%C3%A9eFabre" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#MuséeFabre</a> à <a href="https://mediapart.social/tags/Montpellier" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Montpellier</a> célèbre l’art de <a href="https://mediapart.social/tags/ChristianJaccard" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#ChristianJaccard</a> en exposant la <a href="https://mediapart.social/tags/donation" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#donation</a> reçue de l’artiste franco-suisse. Avec une quarantaine d’œuvres des années soixante-dix à aujourd’hui, «Christian Jaccard. Une collection» couvre toutes les périodes d’une œuvre prolifique caractérisée par la <a href="https://mediapart.social/tags/combustion" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#combustion</a> et la transmutation des matières. ✒️ Par guillaume lasserre | En accès libre › <a href="https://blogs.mediapart.fr/guillaume-lasserre/blog/160424/christian-jaccard-nouer-bruler" rel="nofollow noopener noreferrer" translate="no" target="_blank">https://blogs.mediapart.fr/guillaume-lasserre/blog/160424/christian-jaccard-nouer-bruler</a>

dasgrueneblattI wrote about our plans for a <a href="https://wien.rocks/tags/summer" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#summer</a> <a href="https://wien.rocks/tags/vacation" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#vacation</a> to <a href="https://wien.rocks/tags/Greece" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Greece</a> without airtravel a while ago. I'd said I wanted to put my money and effort where my mouth is. Now I wanted to add a follow-up, but the original post is already gone. My fault for setting auto-deletion to 3 months.Two adults and two children travelled from <a href="https://wien.rocks/tags/Vienna" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Vienna</a> 🇦🇹 to <a href="https://wien.rocks/tags/Corfu" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Corfu</a> 🇬🇷 and back via <a href="https://wien.rocks/tags/Italy" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Italy</a> 🇮🇹 , with some sightseeing in <a href="https://wien.rocks/tags/Ancona" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Ancona</a>, Corfu Town, <a href="https://wien.rocks/tags/Brindisi" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Brindisi</a>, and <a href="https://wien.rocks/tags/Rome" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Rome</a> without using any cars or airplanes. I had bought additional travel insurance for missed connections, but we didn't need that. Itinerary: Tram, <a href="https://wien.rocks/tags/Nightjet" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Nightjet</a> sleeper, bus, <a href="https://wien.rocks/tags/ferry" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#ferry</a>, bus, bus, (hotel stay with occasional outings by bus), bus, bus, ferry, shuttle bus, bus, (hotel), <a href="https://wien.rocks/tags/Frecciargento" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Frecciargento</a> train, (hotel, metro and bus for <a href="https://wien.rocks/tags/sightseeing" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#sightseeing</a>), <a href="https://wien.rocks/tags/Frecciarossa" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Frecciarossa</a> train, Nightjet sleeper, metro. (Busses means regular public transit busses on numbered lines that the locals also take.)Every single vehicle everywhere had working air condition. They were clean and on time, and all the longer trips had tasty food. There's power outlets everywhere. The Frecciarossa (red arrow) between Rome and <a href="https://wien.rocks/tags/Bologna" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Bologna</a> only got to 250 km/h, not the 300 we were hoping to see, but that was the only slightest disappointment. The ferries are not at all climate-friendly. I have not found a number for how much <a href="https://wien.rocks/tags/CO" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#CO</a>² for a crossing, but they are similar to cruise ships. The trips are far shorter than cruises of course, but we see and smell the black smoke from the stacks. It's wrong to feel smug about taking a ferry instead of an airplane. All the busses had <a href="https://wien.rocks/tags/combustion" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#combustion</a> engines. All the trains/metros/trams were <a href="https://wien.rocks/tags/electric" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#electric</a>, so that depends on the grid. The Austrian ÖBB prides itself on using only "green" <a href="https://wien.rocks/tags/electricity" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#electricity</a>. We enjoyed the trip very much. I am unsure about any future travel. I would totally do this again in terms of comfort and experiences. But my goals for how much I hope to not pollute and damage the world for my pleasure have changed. I have no answers right now.<a href="https://wien.rocks/tags/stayGrounded" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#stayGrounded</a> <a href="https://wien.rocks/tags/climateCatastrophe" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#climateCatastrophe</a> <a href="https://wien.rocks/tags/ClimateDiary" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#ClimateDiary</a>

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