Commun. Comput. Phys., 16 (2014), pp. 1081-1101.


Simulation of Propagating Acoustic Wavefronts with Random Sound Speed

Sheri L. Martinelli 1*

1 Undersea Warfare Weapons, Vehicles, and Defensive Systems Department, Naval Undersea Warfare Center, Newport, Rhode Island 02841, USA.

Received 25 September 2013; Accepted (in revised version) 8 April 2014
Available online 12 August 2014
doi:10.4208/cicp.250913.080414a

Abstract

A method for simulating acoustic wavefronts propagating under random sound speed conditions is presented. The approach applies a level set method to solve the Eikonal equation of high frequency acoustics for surfaces of constant phase, instead of tracing rays. The Lagrangian nature often makes full-field ray solutions difficult to reconstruct. The level set method captures multiple-valued solutions on a fixed grid. It is straightforward to represent other sources of uncertainty in the input data using this model, which has an advantage over Monte Carlo approaches in that it yields an expression for the solution as a function of random variables.

AMS subject classifications: 60H35, 65M70, 65C20

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Key words: Level set method, wavefront methods, high-frequency acoustic propagation, stochastic collocation.

*Corresponding author.
Email: sheri_martinelli@alumni.brown.edu (S. L. Martinelli)
 

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