Acoustical boundary hologram for macroscopic rigid-body levitation

Rigid body modeling issue in acoustical topology optimization

For gradient-based acoustical topology optimization, the acoustical properties of an acoustic medium are interpolated. Although the lower limit values of the density and sound speed simulating a rigid body affect the accuracy of the final results significantly, an in-depth study on the selection of these limit values is rare. In the first part of this work, the importance of the proper choice o...

Extrinsic and intrinsic acoustical cross-sections for a viscous fluid particle near a planar rigid boundary: circular cylinder example

The objective of this investigation is to derive closed-form partial-wave series expansions for the extrinsic and intrinsic acoustical scattering, extinction and absorption cross-sections of afluid viscous cylindrical particle of arbitrary geometrical cross-section, located nearby a flat rigid boundary. Plane progressive waves with arbitrary incidence angle are considered in a non-viscous fluid...

A boundary element study for evaluation of the effects of the rigid baffles on liquid sloshing in rigid containers

In this paper, the sloshing response of liquid in a two dimensional rigid rectangular tank with rigid baffles is investigated using boundary element technique. A baffle is a supplementary structural element which supplies a kind of passive control on the effects of ground shaking. The complicated liquid domain is divided into two simple sub-domains so that the liquid velocity potential in each ...

Extrinsic and intrinsic acoustical cross-sections for a viscous fluid particle near a planar rigid boundary: circular cylinder example

The objective of this investigation is to derive closed-form partial-wave series expansions for the extrinsic and intrinsic acoustical scattering, extinction and absorption cross-sections of afluid viscous cylindrical particle of arbitrary geometrical cross-section, located nearby a flat rigid boundary. Plane progressive waves with arbitrary incidence angle are considered in a non-viscous fluid...

Index-matched Boundary Techniques for the Elimination of Acoustical Resonances