A Parallel Code for Time-Dependent acoustic Scattering Involving Passive or Smart Obstacles

Author:

Migliori Silvio1,Bracco Giovanni2,Fatone Lorella3,Recchioni Maria Cristina4,Zirilli Francesco5

Affiliation:

1. ENEA, Servizio Centralizzato Informatica e Reti, Lungotevere Thaon di Revel, Roma, Italy

2. ENEA, Servizio Centralizzato Informatica e Reti, Frascati (RM), Italy,

3. Dipartimento di Matematica e Informatica, Universita di Camerino, Italy,

4. Dipartimento di Scienze Sociali, D. Serrani, Università Politecnica delle Marche, Piazza, Italy,

5. Dipartimento di Matematica, G. Castelnuovo, Università di Roma, La Sapienza, Piazzale, Italy, ,

Abstract

A highly parallelizable numerical method to solve three-dimensional time-dependent acoustic obstacle scattering problems involving passive or smart, furtive, realistic obstacles is presented. ‘‘Realistic’’ obstacles have complex geometries, ‘‘passive’’ obstacles do not react by taking an action to pursue a goal when hit by an incoming wave, and ‘‘smart furtive’’ obstacles, when hit by an incoming wave, pursue the goal of being undetectable by circulating a suitable pressure current on their boundaries. Incoming wave packets containing time-harmonic waves of small wavelengths when compared with the characteristic dimension of the obstacles are considered. The features of the computational method proposed to solve these scattering problems that can be exploited in a parallel and/or distributed computing environment are presented. Numerical experiments involving a simplified version of the NASA space shuttle are discussed. The websites: http://www.econ.univpm.it/ recchioni/scattering/w12, http://www.econ.univpm.it/recchioni/scattering/w14 contain animations and virtual reality applications showing some numerical experiments relative to the problems studied. A more general reference to the work of some of the authors and of their coworkers in acoustic and electromagnetic scattering is the website: http://www.econ. univpm.it/recchioni/scattering.

Publisher

SAGE Publications

Subject

Hardware and Architecture,Theoretical Computer Science,Software

Cited by 1 articles. 订阅此论文施引文献 订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献

1. Acoustic Scattering Cross Sections of Smart Obstacles: A Case Study;Communications in Computational Physics;2011-09

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