0000000000934847

AUTHOR

Kim Shyong Siow

showing 2 related works from this author

Guiding and confinement of interface acoustic waves in solid-fluid pillar-based phononic crystals

2016

International audience; Pillar-based phononic crystals exhibit some unique wave phenomena due to the interaction between surface acoustic modes of the substrate and local resonances supported by pillars. In this paper, we extend the investigations by taking into account the presence of a liquid medium. We particularly demonstrate that local resonances dramatically decrease the phase velocity of Scholte-Stoneley wave, which leads to a slow wave at the solid/fluid interface. Moreover, we show that increasing the height of pillars introduces a new set of branches of interface modes and drastically affects the acoustic energy localization. Indeed, while some modes display a highly confined pres…

[SPI.ACOU]Engineering Sciences [physics]/Acoustics [physics.class-ph]010302 applied physicsPhysical acousticsMaterials scienceAcousticsMicrofluidicsSurface acoustic waveGeneral Physics and Astronomy02 engineering and technologyAcoustic waveMechanics021001 nanoscience & nanotechnologyIon acoustic wave01 natural scienceslcsh:QC1-999Finite element method[SPI.MAT]Engineering Sciences [physics]/MaterialsPhysics::Fluid Dynamics0103 physical sciences[SPI.NANO]Engineering Sciences [physics]/Micro and nanotechnologies/MicroelectronicsPhase velocity0210 nano-technologylcsh:PhysicsAcoustic resonanceAIP Advances
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Solid-fluid interaction in a pillar-based phononic crystal

2016

In this paper, we investigate the wave dispersion of two dimensional pillar-based phononic crystal surrounded in liquid medium. An unit cell structure with reduced pillar height (hp/a)=0.5 and reduced radius (rp/a)=0.3 is simulated using Finite Element Method. The geometrical parameter is chosen to demonstrate a local resonance mechanism that allow the confinement of elastic energy at the interface between the solid and the fluid. In order to identify the energy distribution, we represent the eigenmode at high symmetry (point X) in the first Brillouin zone. The decreasing trend of frequency is also boosted with the increase of pillar height. From the total displacement, the energy is mostly…

Materials sciencebusiness.industryElastic energy02 engineering and technology021001 nanoscience & nanotechnology01 natural sciencesSymmetry (physics)Finite element methodPhysics::Fluid DynamicsBrillouin zoneCrystalOpticsNormal mode0103 physical sciencesOptoelectronics010306 general physics0210 nano-technologybusinessActuatorDisplacement (fluid)2016 IEEE International Conference on Semiconductor Electronics (ICSE)
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