TY - JOUR
T1 - Modeling of transient ultrasonic wave propagation using the distributed point Source Method
AU - Rahani, Ehsan Kabiri
AU - Kundu, Tribikram
N1 - Funding Information:
Manuscript received March 25, 2011; accepted July 18, 2011. This research was partially supported by the air Force office of scientific research (aFosr) grant (#Fa9550-08-1-0318); program managers are dr. david stargel and dr. Victor Giurgiutiu. The results and conclusions presented here are those of the authors and do not represent the views of aFosr.
PY - 2011/10
Y1 - 2011/10
N2 - Transient ultrasonic waves in a fluid medium generated by a flat circular and a point-focused transducer of finite size are modeled by the distributed point source method (DPSM). DPSM is a Green's-function-based semi-analytical mesh-free technique which is modified here to incorporate the transient loading from a finite-sized acoustic transducer. Conventional DPSM solves acoustic problems in steady-state frequency domain. Here, DPSM is extended to the time domain without the fast Fourier transform (FFT) but using the Green's function in the time domain. This modified method is denoted t-DPSM. Harmonic point sources of DPSM are replaced by time-dependent point sources in t-DPSM. Generated t-DPSM results are compared with the finite element (FE) results for both focused and flat circular transducers. The developed method is used to solve the transient problem of wave scattering by an air bubble in a fluid as the bubble is moved horizontally or vertically from the focal point of the focused transducer. The received energy signal is compared for different eccentricities.
AB - Transient ultrasonic waves in a fluid medium generated by a flat circular and a point-focused transducer of finite size are modeled by the distributed point source method (DPSM). DPSM is a Green's-function-based semi-analytical mesh-free technique which is modified here to incorporate the transient loading from a finite-sized acoustic transducer. Conventional DPSM solves acoustic problems in steady-state frequency domain. Here, DPSM is extended to the time domain without the fast Fourier transform (FFT) but using the Green's function in the time domain. This modified method is denoted t-DPSM. Harmonic point sources of DPSM are replaced by time-dependent point sources in t-DPSM. Generated t-DPSM results are compared with the finite element (FE) results for both focused and flat circular transducers. The developed method is used to solve the transient problem of wave scattering by an air bubble in a fluid as the bubble is moved horizontally or vertically from the focal point of the focused transducer. The received energy signal is compared for different eccentricities.
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U2 - 10.1109/TUFFC.2011.2071
DO - 10.1109/TUFFC.2011.2071
M3 - Article
C2 - 21989885
AN - SCOPUS:80054063373
SN - 0885-3010
VL - 58
SP - 2213
EP - 2221
JO - IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
JF - IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
IS - 10
M1 - 6040011
ER -