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Modelling of the ultrasonic field by the angular spectrum method in presence of interface

✍ Scribed by D. Belgroune; J.F. de Belleval; H. Djelouah

Publisher
Elsevier Science
Year
2002
Tongue
English
Weight
663 KB
Volume
40
Category
Article
ISSN
0041-624X

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✦ Synopsis

We present a numerical modelling of the harmonic sound in two isotropic media, one liquid and the other solid separated by a plane interface. This numerical modelling is carried out by the angular spectrum method. This latter is applied to calculate the displacement potential generated by a rectangular transducer with a Gaussian profile and with an uniform profile. The rigorous modelling of the field needed to find the optimal parameters of the decomposition according to the transducer aperture and the ultrasonic wave frequency.

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## Abstract In this study, we propose a model to simulate electrical conduction of single carrier organic diodes in the presence of a barrier for carrier injection and considering a field‐dependent carrier mobility. An analytical expression for the internal electric field function, that simplifies