The accuracy and efficiency of the SPH acoustic computation are evaluated, and a comparison of cases with different object sizes is also discussed. In order to validate the SPH algorithm, the velocity of the sinking circular object in the water is computed and compared Finally, the underwater sound generated by the fluid-structure interaction is obtained with an acoustic analogy theory. Of fluid particles is used to compute the sound source. In this thesis, a nanoscale meshfree particle method with the implementation of the. Firstly, the flow field is computed by solving Lagrangian fluid dynamic equations with the SPH method. Since meshfree particle methods have advantages on simulating the problems involving extremely large deformations and moving boundaries, they become attractive options to be used in the hierarchical multiscale modeling to approximate a large number of atoms. The transient sound generated from the interaction of a rigid object falling into water is investigated with the smoothed particle hydrodynamics (SPH) method. In this paper, the coupled weakly compressible (WC) and total Lagrangian (TL) smoothed particle hydrodynamics (SPH) model based on the open-source multi-physics and multi-resolution SPHinXsys library is used to simulate the structural deformation and failure problem in fluid-structure interaction (FSI). This work presents a Lagrangian meshfree particle method in solving time-dependent fluid-sturcture-acoustic The meshfree particle method, which is always regarded as a pure Lagrangian approach, is easily represented complicated domain topologies, moving boundaries, and multiphase media.
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