I'm a beginner brewer, but I've noticed that on every batch I've done so far, when the wort is boiling, and I stir the wort, it ends up behaving this way. Can anyone explain why this happens?
There is a scientific paper on this, but it is locked behind a paywall, and I doubt I could understand it anyway. I am not a scientist, but I think this is what is happening in layperson's terms:
Remind me to tell my theory on why the moon is made of cheese. :)