Articles you may be interested in Subwavelength waveguiding of surface phonons in pillars-based phononic crystal Superlensing effect for surface acoustic waves in a pillar-based phononic crystal with negative refractive index Appl. Simulations of acoustic waves bandgaps in a surface of silicon with a periodic hole structure in a thin nickel film Finite element analysis and experimental study of...

This work presents a mathematical approach based on the point collocation technique to compute the transmission loss of perforated dissipative silencers with transversal temperature gradients and mean flow. Three-dimensional wave propagation is considered in silencer geometries with arbitrary, but axially uniform, cross section. To reduce the computational requirements of a full multidimensiona...

Computer-based modelling is becoming standard practice in modern room acoustics. Its applications range from prediction of design parameters, visualization of sound propagation and auralisation [1]. Traditional architectural acoustic modelling methods, such as Ray-Tracing [2] and Image-Source models [3], draw on geometrical assumptions and therefore may be confidently applied only to an explici...

An extremely efficient method for modeling wave propagation in a membrane is provided by the multidimensional extension of the digital waveguide. The 2-D digital waveguide mesh is constructed out of bidirectional delay units and scattering junctions. We show that it coincides with the standard finite difference approximation scheme for the 2-D wave equation, and we derive the dispersion error. ...

In this work the numerical solution of acoustic tomography problem based on iterative and functional-analytical algorithms is considered. The mathematical properties these were previously described in works R.G.Novikov for case Schr\"odinger equation. present work, two-dimensional scalar Helmholtz equation, efficiency algorithm reconstruction middle strength scatterers advantages approach recov...

The propagation of a surface acoustic wave (SAW) on GaAs/AlGaAs heterostructures is studied in the case where the two-dimensional electron gas (2DEG) is subject to a high magnetic field and a smooth random potential with correlation length Λ and amplitude ∆. The electron wave functions are described in a quasiclassical picture using results of percolation theory for two-dimensional systems. We ...

The Benjamin-Bona-Mahony equation has improved short-wavelength behaviour, as compared to the Korteweg-de Vries equation, and is another uni-directional wave equation with cnoidal wave solutions. Cnoidal wave solutions can appear in other applications than surface gravity waves as well, for instance to describe ion acoustic waves in plasma physics. Using a computerized symbolic computation tech...

The acoustic wave attenuation is described by an experimentally established frequency power law in a variety of complex media, e.g., biological tissue, polymers, rocks, and rubber. Recent papers present a variety of acoustical fractional derivative wave equations that have the ability to model power-law attenuation. On the other hand, a multiple relaxation model is widely recognized as a physic...

We have designed a fast parallel simulator that solves the acoustic wave equation on a GPU cluster. Solving the acoustic wave equation in an oil exploration industrial context aims at speeding up seismic modeling and Reverse Time Migration. We use a finite difference approach on a regular mesh, in both 2D and 3D cases. The acoustic wave equation is solved in either a constant density or a varia...

Abstract In this work we review discontinuous Galerkin finite element methods on polytopal grids (PolydG) for the numerical simulation of multiphysics wave propagation phenomena in heterogeneous media. particular, address elastic, poro-elastic, and poro-elasto-acoustic materials. Wave is modeled by using either elastodynamics equation elastic domain, acoustics equations acoustic domain low-freq...