Numerical simulations of acoustic waves with the graphic acceleration GAMER code

• Autorzy: Murawski K. , Schive H.
• Języki publikacji: EN

Abstrakty

EN

We present results of numerical simulations of acoustic waves with the use of the Graphics Processing Unit (GPU) acceleration GAMER code which implements a second-order Godunov-type numerical scheme and adaptive mesh refinement (AMR). The AMR implementation is based on constructing a hierarchy of grid patches with an octree data structure. In this code a hybrid model is adopted, in which the time-consuming solvers are dealt with GPUs and the complex AMR data structure is manipulated by Central Processing Units (CPUs). The code is highly parallelized with the Hilbert space-filling curve method. These implementations allow us to resolve well desperate spatial scales that are associated with acoustic waves. We show that a localized velocity (gas pressure) pulse that is initially launched within a uniform and still medium triggers acoustic waves simultaneously with a vortex (an entropy mode). In a flowing medium, acoustic waves experience amplitude growth or decay, a scenario which depends on a location of the flow and relative direction of wave propagation. The amplitude growth results from instabilities which are associated with negative energy waves.

Słowa kluczowe

EN

numerical simulation; acoustic waves; graphic acceleration GAMER code

• Wydawca: Polska Akademia Nauk, Wydział IV Nauk Technicznych
• Czasopismo: Bulletin of the Polish Academy of Sciences. Technical Sciences
• Rocznik: 2012
• Tom: Vol. 60, nr 4
• Strony: 787--792
• Opis fizyczny: Bibliogr. 13 poz., rys., tab.

Twórcy

autor

Murawski K.

autor

Schive H.

• Faculty of Physics, Mathematics and Informatics, University of Maria Curie-Skłodowska, 1 M. Curie-Skłodowskiej Sq., 20-031 Lublin, Poland

Bibliografia

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