Bianisotropic Acoustic Metafluids in an Aqueous Environment
Abstract
Recent research has shown that fluids embedded with subwavelength scatterers can be described as an effective fluid, or metafluid, withdynamic effective properties. If the scatterers exhibit asymmetry and/or if multiple-scattering between scatterers is not negligible, bianisotropyemerges. Acoustic bianisotropy is characterized by coupling between the effective stress-strain and velocity-momentum relations of the metafluid. Theoretical homogenization schemes have demonstrated emergent acoustic bianisotropy for an infinite array of subwavelength scatterers in a fluid matrix. Experimental studies demonstrated individual asymmetric scatterers and metasurfaces that exhibit acoustic bianisotropy. However, previously proposed scatterers were not suitable for an aqueous environment, and previous experiments were limited to one and two dimensions. This report summarizes the approach and accomplishments of the work performed by Caleb F. Sieck with the support of a Karles Fellowship towards designing and experimentally testing a three dimensional aqueous bianisotropic metafluid.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 2020
- Accession Number
- AD1116832
Entities
People
- Caleb F. Sieck
Organizations
- United States Naval Research Laboratory