Acoustic directional source based on Penrose quasi-crystal arrangements of metallic rods embedded in a fluid
| Autor: | Hervé Franklin, Alain Tinel, K. Zong |
|---|---|
| Přispěvatelé: | Laboratoire Ondes et Milieux Complexes (LOMC), Centre National de la Recherche Scientifique (CNRS)-Université Le Havre Normandie (ULH), Normandie Université (NU)-Normandie Université (NU) |
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Physics
Acoustics and Ultrasonics business.industry Quasicrystal 02 engineering and technology Acoustic wave 021001 nanoscience & nanotechnology 01 natural sciences Symmetry (physics) Collimated light Rod [SPI]Engineering Sciences [physics] Optics 0103 physical sciences Monochromatic color 010306 general physics 0210 nano-technology business Intensity (heat transfer) ComputingMilieux_MISCELLANEOUS Penrose tiling |
| Zdroj: | Ultrasonics Ultrasonics, Elsevier, 2019, 94, pp.3-9. ⟨10.1016/j.ultras.2018.12.014⟩ |
| ISSN: | 0041-624X |
| Popis: | The directional emission properties of a circular device formed of a small number of metallic rods placed at the nodes of Penrose’s tiling are investigated. At the center of the device a non-directional primary source emits monochromatic acoustic waves. In a wide frequency range, the beams come out of the device along preferential directions related to the symmetry of order 5 of the tiling and the non-periodicity in the radial direction. There are some frequencies for which the waves are completely trapped by the device. The shape, the distribution and the intensity of the emitted beams outside are closely dependent on the frequency. A comparison between numerical results and experiments is presented. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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