Energy absorption from an oscillating fluid using an engineered acoustic diode

• Published in: The Journal of the Acoustical Society of America 2024-03, Vol.155 (3_Supplement), p.A120-A120
• Main Authors: Schmidt, Rico, Roy, Indradip, Yousef, Hosam, Aboueria, Alex, Scalo, Carlo, Nouh, Mostafa
• Format: Article
• Language: English
• ISSN: 0001-4966; 1520-8524
• DOI: 10.1121/10.0027014

Over the past decade, engineered subsurface structures inspired by acoustic metamaterial configurations have shown promising results in boundary layer control through different energy stabilization mechanisms. Despite the potential shown via numerical simulations, the underlying interfacial dynamics between a fluid column and a compliant metamaterial remain largely unexplored. Our preliminary studies have shown that conventional phononic band gaps are insufficient for effective control since the bulk of the absorbed energy remains confined to the fluid-structural interface, a direct consequence of localized modes associated with band gap truncation resonances. In this talk, we will discuss the mathematical intricacies of impedance boundary conditions (IBCs) at the interface of a one-dimensional fluid and an engineered structure, shedding light on both linear and non-linear subsurface behaviors. Through which, we will present a new pathway to effectively transmit a pressure wave from an oscillating fluid away from the interface, and into a structural medium.