Numerical modeling of thermoelastic laser-generation of ultrasonic waves

Author

Veres, István A. ; Berer, Thomas ; Reitinger, Bernhard ; Burgholzer, Peter

Author_Institution

Christian Doppler Lab. for Photoacoustic Imaging & Laser Ultrasonics, Linz, Austria

fYear

2011

fDate

18-21 Oct. 2011

Firstpage

1091

Lastpage

1094

Abstract

Laser generation of ultrasound is investigated numerically in the presented paper. The coupled heat and wave equations are solved with Finite Difference Time Domain (FDTD) and Finite Element Methods (FEM). The influence of the thermal feedback on the propagating pulse shape is investigated providing evidence that the coupling introduces dispersion in a non-dispersive system. In addition, wave fields from a line focused source are presented by a numerical model.

Keywords

acoustic field; finite difference time-domain analysis; finite element analysis; thermoelasticity; ultrasonic dispersion; ultrasonic propagation; ultrasonic waves; ultrasonics; FDTD; FEM; dispersion; finite difference time domain methods; finite element methods; numerical modeling; pulse shape propagation; thermal feedback; thermoelastic laser generation; ultrasonic waves; ultrasound; wave fields; Acoustics; Couplings; Equations; Heating; Mathematical model; Propagation; Stress; laser-generation; numerical solution; ultrasonic waves;

fLanguage

English

Publisher

ieee

Conference_Titel

Ultrasonics Symposium (IUS), 2011 IEEE International

Conference_Location

Orlando, FL

ISSN

1948-5719

Print_ISBN

978-1-4577-1253-1

Type

conf

DOI

10.1109/ULTSYM.2011.0268

Filename

6293260