Modeling of transient ultrasonic wave propagation using the distributed point Source Method

Ehsan Kabiri Rahani, Tribikram Kundu

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

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.

Original languageEnglish (US)
Article number6040011
Pages (from-to)2213-2221
Number of pages9
JournalIEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
Volume58
Issue number10
DOIs
StatePublished - Oct 2011

Fingerprint

Ultrasonic propagation
ultrasonic radiation
point sources
Transducers
wave propagation
Green's function
Acoustic transducers
Fluids
Ultrasonic waves
transducers
Fast Fourier transforms
Acoustics
Scattering
Air
Green's functions
bubbles
acoustics
fluids
wave scattering
eccentricity

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Acoustics and Ultrasonics
  • Instrumentation

Cite this

Modeling of transient ultrasonic wave propagation using the distributed point Source Method. / Rahani, Ehsan Kabiri; Kundu, Tribikram.

In: IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, Vol. 58, No. 10, 6040011, 10.2011, p. 2213-2221.

Research output: Contribution to journalArticle

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