Fanfan 🐻 nihiliste ✋️🔺️🤚 on Nostr: What Parker said was the following: ha, the convective fluid motions are influenced ...

What Parker said was the following: ha, the convective fluid motions are influenced by rotation, they are screwed ! (in the first sense of screwed). Like a corkscrew, if you like. And then he did some geometric-driven back of the envelope calculations , and showed that this can generate magnetic field, which requires this kind of symmetry breaking. But in a particular way: it's a statistical emergent phenomenon. You need many little cyclonic swirls acting together cumulatively to generate a field on a much larger scale than the swirl itself (that of the Sun itself). and when you do some simple math with that, you can show that this, combined with the fact that the sun does not rotate uniformly, can create magnetic cycle. We call this a large-scale fluid dynamo effect, and that particular mechanism based on 3D cyclonic swirls is, in theoretician jargon, called the alpha effect.