Fig. 1: Diagram of the working principle of the tunable acoustic vortex generation without introducing incident wave sources.
From: Tunable acoustic vortex generation by a compact rotating disk
The disk, rotating at Ω rad/s, generates tunable acoustic vortices through the interference of dipole sources formed by this rotating disk’s surface at the angular frequency and its multiples, resulting in acoustic vortices with different topological charges on both sides of the disk. The red spots represent arbitrary points on the disk surface, illustrating the distribution of acoustic dipoles.
