Anisotropic acoustic metafluid for underwater operation.
Journal Article (Journal Article)
The paper presents a method to design and characterize mechanically robust solid acoustic metamaterials suitable for operation in dense fluids such as water. These structures, also called metafluids, behave acoustically as inertial fluids characterized by anisotropic mass densities and isotropic bulk modulus. The method is illustrated through the design and experimental characterization of a metafluid consisting of perforated steel plates held together by rubber coated magnetic spacers. The spacers are very effective at reducing the effective shear modulus of the structure, and therefore effective at minimizing the ensuing coupling between the shear and pressure waves inside the solid effective medium. Inertial anisotropy together with fluid-like acoustic behavior are key properties that bring transformation acoustics in dense fluids closer to reality.
Full Text
Duke Authors
Cited Authors
- Popa, B-I; Wang, W; Konneker, A; Cummer, SA; Rohde, CA; Martin, TP; Orris, GJ; Guild, MD
Published Date
- June 2016
Published In
Volume / Issue
- 139 / 6
Start / End Page
- 3325 -
PubMed ID
- 27369158
Electronic International Standard Serial Number (EISSN)
- 1520-8524
International Standard Serial Number (ISSN)
- 0001-4966
Digital Object Identifier (DOI)
- 10.1121/1.4950754
Language
- eng