乐器中由湍流产生的声音-多物理场模拟方法-
Sound Generation by a Turbulent Flow in Musical Instruments - Multiphysics Simulation Approach -
摘要：
科学模拟的总计算成本之间的直接数值模拟（DNS）和多物理场模拟（MPS）在乐器的声音生成进行了分析。为了在一个简单的类似录音机的仪器中通过湍流产生声学声音，在DNS中需要在仪器的边缘和谐振器周围进行具有低马赫数的可压缩流体动力学计算，而在MPS中使用基于Lighthill声学类比的与声音传播动力学耦合的不可压缩流体动力学计算。这些策略不仅从计算性能的角度进行评估，而且从理论角度作为复杂系统的科学模拟工具。
英文摘要：
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.
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