Title :
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
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;
Conference_Titel :
Ultrasonics Symposium (IUS), 2011 IEEE International
Conference_Location :
Orlando, FL
Print_ISBN :
978-1-4577-1253-1
DOI :
10.1109/ULTSYM.2011.0268
