Multiphysical numerical analysis for acoustic metamaterials in ventilated ducts

Abstract

In recent decades, metamaterials have shown interesting properties in the acoustic, mechanical, and aerospace engineering fields. The characteristic tunability on targeted bandwidth and the freedom of design have lately extended the metamaterial application in the multiphysical domain, for example, achieving systems that simultaneously allow noise insulation and fluid passage. Numerical methods such as FEM has been validated to test single metamaterial physics issue, and lately, mixed physics have been exploited for research and industrial purposes. However, there is still no precise method to follow when tuning acoustic metamaterials (AMMs) with different flow conditions in a multiphysical domain. For this reason, in this study, a Multiphysical FEM is evaluated to assess the implications of different flow characteristics on acoustic performance. First, two mono-physical models separately evaluate the fluid dynamic and acoustic problem. The two physical numerical models are then combined in the second stage, and a correlation between the two approaches (mono and multi-physical) is drawn. These preliminary results could be applied to many flow and frequency range case studies and implemented for Mechanical and Civil Engineering applications.