2.5-D Numerical Simulation of Acoustic Wave Propagation

Helmholtz resonators are known to be efficient resonators for ducts if they are properly designed. A design procedure is suggested in this paper to identify the size of the resonators in one and two degrees of freedom. The procedure is supported by a through numerical simulation of acoustic wave propagation that is presented and is verified using published experimental results. The overall procedure shows achievable great attenuation of noise in pipeline.

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Coupling the BEM/TBEM and the MFS for the numerical simulation of acoustic wave propagation and transient conduction heat transfer

Boundary Elements and Other Mesh Reduction Methods XXXII ◽

10.2495/be100231 ◽

2010 ◽

Author(s):

A. Tadeu ◽

J. António ◽

N. Simões ◽

I. Simões ◽

I. Castro

Keyword(s):

Heat Transfer ◽

Numerical Simulation ◽

Wave Propagation ◽

Acoustic Wave ◽

Acoustic Wave Propagation ◽

Conduction Heat Transfer ◽

Transient Conduction

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Numerical Simulation of Acoustic Wave Propagation to Assess Noise-Induced Damage to Human Hearing

10.21236/ada574401 ◽

2009 ◽

Author(s):

Elizabeth H. Bleszynski ◽

Marek C. Bleszynski ◽

Thomas Jaroszewicz

Keyword(s):

Numerical Simulation ◽

Wave Propagation ◽

Acoustic Wave ◽

Acoustic Wave Propagation ◽

Human Hearing

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Numerical Simulation of Acoustic Wave Propagation in Cylindrical Fluid-Saturated Poroelastic Shell Immersed in Fluids

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.105-107.127 ◽

2011 ◽

Vol 105-107 ◽

pp. 127-131

Author(s):

Wen Yang Gao ◽

Qian Wu ◽

Zhi Wen Cui ◽

Kei Xie Wang ◽

He Feng Dong

Keyword(s):

Numerical Simulation ◽

Cylindrical Shell ◽

Wave Propagation ◽

Acoustic Wave ◽

Acoustic Pressure ◽

Fluid Pressure ◽

Longitudinal Mode ◽

Stoneley Wave ◽

Acoustic Wave Propagation ◽

Full Waveform

Acoustic wave propagation in fluid-saturated porous cylindrical shell is investigated in this paper by using the Biot’s theory. The Expressions for acoustic pressure and radical displacement in and out fluid, the expressions for components of solid and filtration displacement and pore fluid pressure and stress tensor are given. The numerical simulation is operated on acoustic field in fluid of poroelastic cylindrical shell, and the full-waveform is obtained by Fourier transform, and acoustic pressure field in frequency-wavenumber domain is analyzed, as well as the influence of inner and outer radii on wave amplitude is discussed. It shows that if the thickness of shell remains constant, the amplitude of longitudinal mode increases and that of Stoneley wave decreases when inner and outer radii increasing. In the fast formation the influence of inner and outer radii on the amplitude of longitudinal mode is notable. In the slow formation the amplitude of Stoneley wave will decrease with inner and outer radii increasing.

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