Direct simulation of acoustic scattering problems involving fluid-structure interaction using an efficient immersed...

Area of Science:

• Computational physics
• Acoustics
• Fluid dynamics

Background:

• Acoustic scattering and fluid-structure interaction are complex phenomena.
• Direct numerical simulations are crucial for understanding these interactions.
• Existing immersed boundary-lattice Boltzmann methods (IB-LBMs) have limitations in accuracy.

Purpose of the Study:

• To develop an efficient and accurate immersed boundary-lattice Boltzmann method (IB-LBM) for direct simulation of acoustic scattering problems.
• To enhance the accuracy of fluid-structure interaction simulations.
• To validate the improved method against conventional approaches and analytical solutions.

Main Methods:

• Utilizing the lattice Boltzmann method for fluid domain dynamics.
• Employing the immersed boundary method to model fluid-structure interactions.
• Introducing a force correction technique to enforce non-slip boundary conditions at immersed boundaries.

Main Results:

• The enhanced IB-LBM accurately computes acoustic scattering fields.
• Numerical results show improved accuracy compared to conventional IB-LBMs.
• The method demonstrates better efficiency in simulations of acoustic radiation and scattering.

Conclusions:

• The proposed IB-LBM with a force correction technique offers a more accurate and efficient approach for simulating acoustic scattering problems.
• The method is validated through comparisons with established methods and analytical solutions.
• This advancement provides a valuable tool for studying complex fluid-structure interaction acoustics.