Sound Generation by a Turbulent Flow in Musical Instruments - Multiphysics Simulation Approach -

TL;DR

This paper compares direct numerical simulations and multiphysics simulations for modeling sound generation in musical instruments, analyzing their computational efficiency and theoretical validity.

Contribution

It introduces a multiphysics simulation approach for sound generation in musical instruments and evaluates its advantages over DNS in terms of performance and theoretical foundation.

Findings

MPS reduces computational costs compared to DNS.

MPS effectively models sound propagation using Lighthill's acoustic analogy.

Both methods are evaluated for their suitability in complex system simulations.

Abstract

Total computational costs of scientific simulations are analyzed between direct numerical simulations (DNS) and multiphysics simulations (MPS) for sound generation in musical instruments. In order to produce acoustic sound by a turbulent flow in a simple recorder-like instrument, compressible fluid dynamic calculations with a low Mach number are required around the edges and the resonator of the instrument in DNS, while incompressible fluid dynamic calculations coupled with dynamics of sound propagation based on the Lighthill's acoustic analogy are used in MPS. These strategies are evaluated not only from the viewpoint of computational performances but also from the theoretical points of view as tools for scientific simulations of complicated systems.