Experimental demonstration of improvements to operator splitting method using field II

Fox, P.D. (2007) Experimental demonstration of improvements to operator splitting method using field II. In IEEE International Ultrasonics Symposium 2007. IEEE. pp. 1732-1735 . (doi:10.1109/ULTSYM.2007.436).

Record type: Conference or Workshop Item (Paper)

Abstract

This article describes a recent improvement in the accuracy with respect to propagation distance of an operator splitting approach used in conjunction with Field II for nonlinear propagation modeling. In its initial implementation the method used fixed parameters for propagation of virtual planes used in the algorithm, and these were shown to produce simulated nonlinear pulses which matched experimental nonlinear pulses well at a selected propagation distance. However, when propagating to several multiples of this distance the method was found to degrade in accuracy with respect to experimental measurements. In this paper initial results obtained by switching from the fixed parameter approach for the plane propagation to an adaptive parameter approach are given. Comparison with experimental data shows a notable increase in accuracy over the previous approach, suggesting that further work on developing adaptive approaches for the plane propagation could prove beneficial. The results are only preliminary and a more comprehensive study of different experimental data sets and adaptive parameter selection schemes should be made before any definitive conclusions are drawn.

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