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Showing 1 to 6 of 6 for “"Periodic media"”.
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Imaging surface acoustic waves in anisotropic and periodic media
… surface-wave propagation on a variety of periodic structures. Carbon-fiber/epoxy composites are first examined, and the elastic properties of a homogeneous sample are used to determine the surface-wave velocities of layered samples in the long-wavelength limit. Two systems are then …
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Direct and inverse electromagnetic scattering problems for bi-anisotropic periodic media
… inverse scattering problems for bi-anisotropic periodic media in three dimensions. The scattering phenomenon of interest occurs when electromagnetic waves interact with a bi-anisotropic periodic scattering object and is governed by the time-harmonic Maxwell’s equations with Rayleigh radiation …
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Dynamic Homogenization Of Linear Waves In Periodic Media And Origami-Inspired Structures
… at arbitrary frequency in (i) “perforated” periodic con- tinua, and (ii) periodic origami-inspired structures described via “bar-and-hinge” com- putational paradigm. For a given spectral (i.e. frequency-wavenumber) content the body force acting on the structure, the “activated” Bloch …
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Lattice Boltzmann Study of the Interstitial Hydrodynamics and Dispersion in Steady Inertial Flows in Large Randomly Packed Beds
… In contrast to predictions based on regular periodic media, low porosity simulations for randomly packed beds predict a significant increase in the lateral dispersivity with Peclet number in complete agreement with experimental data. For longitudinal dispersion, disorder is shown to lead to a …
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Band topology beyond symmetry eigenvalues with applications to electronic and phononic systems
… to study the physics of electrons and phonons in periodic media. The ultimate goal is to understand what topological properties are hidden in the electronic and phononic band structures, and how robust these properties are. We describe various new kinds of band topology, which emerge when …
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Theoretical and experimental studies of the dynamics and acoustics of forced ordered granular networks
… between particles the dynamics of granular media is highly tunable ranging from being strongly nonlinear and non-smooth in the absence of static pre-compression, to reducing to weakly nonlinear and smooth for large static pre-compression. The nonlinearity in uncompressed granular media …