Fig. 5: Additional results at 63 kHz.
From: Elastic orbital angular momentum transfer from an elastic pipe to a fluid

Absolute Pressure (∣P∣2) of a FEM simulation and b Experimental results, evaluated under the same analysis and at the same plane as in Fig. 2, showing qualitative agreement of the acoustic mode shape in the fluid. The dashed white circles show the positions of the inner and outer radii of the pipe.