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

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.Comment: 6 pages, 10 figure files, to appear in the proceedings of HPCAsia0

Anomalous behavior of singularities of solution on stable and/or unstable manifolds(Perspectives of Nonequilibrium Statistical Physics-The Memory of Professor Shuichi Tasaki-)

この論文は国立情報学研究所の電子図書館事業により電子化されました。Anomalous behavior of singularities of solution on stable and/or unstable manifolds is discussed and an aspect understanding complexity of chaotic trajectories from the view point of complex dynamical systems is given