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28 April 2023 Controlling acoustic waves via rotational motion
Mohamed Farhat, Ying Wu
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Proceedings Volume 12483, Active and Passive Smart Structures and Integrated Systems XVII; 124830A (2023) https://doi.org/10.1117/12.2657045
Event: SPIE Smart Structures + Nondestructive Evaluation, 2023, Long Beach, California, United States
Abstract
In this presentation, I will introduce our recent advances on controlling acoustic wave propagation via spinning media. We will start from a review of the theoretical framework for the scattering problem by a rotation object. Then we will introduce a generalized scattering cancellation theory (SCT) to cloak spinning objects from static observers. In another example, we will study the torque and force a spinning cylindrical column of fluid experiences in evanescent acoustic fields, and show that the resulting discontinuity can scatter sound in unusual ways, e.g., a negative radiation force.
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Mohamed Farhat and Ying Wu "Controlling acoustic waves via rotational motion", Proc. SPIE 12483, Active and Passive Smart Structures and Integrated Systems XVII, 124830A (28 April 2023); https://doi.org/10.1117/12.2657045
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KEYWORDS
Acoustics
Wave propagation
Mie scattering
Scattering
Absorption
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