Acoustic treaming visualization in elastic spherical cavities

Visualization of Hypopharyngeal Cavities and Vocal-Tract Acoustic Modeling

The hypopharyngeal cavities constitute a bottom part of the vocal tract near the larynx consisting of the supraglottic laryngeal cavity and the bilateral cavities of the piriform fossa. Visualization of those cavities with custom magnetic resonance imaging techniques reveals that during speech the laryngeal cavity takes a form of a long-neck flask and the piriform fossa a goblet of varying shap...

Seismic resonances of spherical acoustic cavities

Topological Derivative for the Inverse Scattering of Elastic Waves

To establish an alternative analytical framework for the elastic-wave imaging of underground cavities, the focus of this study is an extension of the concept of topological derivative, rooted in elastostatics and shape optimization, to three-dimensional elastodynamics involving semiinfinite and infinite solids. The main result of the proposed boundary integral approach is a formula for topologi...

Packing of elastic wires in spherical cavities.

We investigate the morphologies and maximum packing density of thin wires packed into spherical cavities. Using simulations and experiments, we find that ordered as well as disordered structures emerge, depending on the amount of internal torsion. We find that the highest packing densities are achieved in low torsion packings for large systems, but in high torsion packings for small systems. An...

Exact Simplified Non-Linear Stress and Fracture Analysis around Cavities in Rock

M. A. BIOT* A non-linear analysisforfinite strain and stress has been developed and applied to symmetrical deformations around cylindrical and spherical cavities in rock. The material non-linearity which is involved may result porn either elastic or plastic properties. A drastic analytical simplification reduces the problem to the solution of a,first order differential equation. Fracture is ana...