Is there a name for this anime/manga visual convention?

Question

sometimes when a character is frustrated or has failed to do something, a cloud made of moving squiggly lines will form above their head (it's somewhat of a common trope in video games that use speech bubbles too.)

Is there a name for this anime/manga visual convention?

Answer 1

Yes, this pictorial rune has the name: twirl.

These pictorial rune's originate from Forceville's categorization, which mostly describes the location/orientation.

This is often used to depict movement as well as confusion, as described by samcyb

_{Forcevile Image source: source}