Elastic Orbital Angular Momentum
G.J. Chaplain, J.M. De Ponti, R.V. Craster
TL;DR
This paper demonstrates that elastic waves in pipes can carry and transfer orbital angular momentum through coupling with surrounding fluids, opening new possibilities for wave manipulation and energy transfer.
Contribution
It introduces the concept of elastic orbital angular momentum in guided elastic waves and shows how it can be transferred to acoustic fields in fluids.
Findings
Elastic guided waves in pipes carry well-defined orbital angular momentum.
Orbital angular momentum can be transferred from elastic waves to surrounding fluids.
Numerical demonstration of elastic orbital angular momentum transfer.
Abstract
We identify that flexural guided elastic waves in elastic pipes carry a well-defined orbital angular momentum associated with the compressional dilatational potential. This enables the transfer of elastic orbital angular momentum, that we numerically demonstrate, through the coupling of the compressional potential in a pipe to the acoustic pressure field in a surrounding fluid in contact with the pipe.
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