Numerical Simulation of Acoustics Wave Propagation in  Bubbly Media, Using Lattice Boltzmann Method

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Salimi, Hesameddin | 2014

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Type of Document: M.Sc. Thesis
Language: Farsi
Document No: 46558 (45)
University: Sharif University of Technology
Department: Aerospace Engineering
Advisor(s): Taeibi Rahni, Mohammad; Massah, Hamid Reza
Abstract:
The Phenomena of generation and propagation of pressure waves (e.g. sounds) are of fundamental importance in studying fluid dynamics. Conventional computational fluid dynamics (CFD) simulations has always been part of the investigation. On the other hand, the lattice Boltzmann method (LBM) has been developed into an alternative and promising numerical method for simulating sound propagation in heterogeneous media with complex geometries. In this project, propagation of sound waves in a liquid was simulated, using lattice Boltzmann method (LBM) and particularly phononic model. To survey effect of different viscosities on this phenomenon, the kinematic viscosity of the medium was varied and the results were monitored. Also the behavior of the sound wave in interaction with an empty bubble was simulated. Computer code was validated using analytical solutions for propagation in homogenous media and reflection from a free surface. Thus, the capabilities of phononic model for sound propagation were promising
Keywords:
Bubble ; Sound Propagation ; Lattice Boltzmann Method ; Heterogeneous Media ; Lattice Boltzmann Phononic Model

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