Similarly, I don't know where to dump this:
https://phys.org/news/2017-09-turbul...rs-plasma.html
Room temperature helium plasma jets modulated with sound waves.
Quote:
When the researchers simulated the plasma jets, they found that the electrodes in the instrument—which are needed to create the electric field that makes the plasma—generate heat. This heat spawns a sound wave that travels out through the jet and along the boundary where the plasma meets the air, a layer that's prone to be unstable. The sound wave disturbs this layer, likely triggering turbulent plumes.
Now that this phenomenon is relatively understood, Kushner said, researchers can enhance or dampen this effect, depending on what's best for the patient. Ultimately, he said, this new analysis can lead to an approved and reliable treatment.
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