Nonlinear effects computed in Gaussian beams propagating in liquids

• Autorzy: Wójcik W. , Kujawska T. , Filipczyński L.
• Języki publikacji: EN

Abstrakty

EN

The existing theory of focused Gaussian nonlinear beams is based on the parabolic approximation which is not valid near to the sound source, and is restricted to weakly concave transducers. The authors have solved the exact problem of nonlinear propagation of focused Gaussian beams in lossy media without the above limitations. For this purpose a numerical model of the first author was used.

• Wydawca: Polskie Towarzystwo Akustyczne. Oddział Gdański
• Czasopismo: Hydroacoustics
• Rocznik: 2001
• Tom: Vol. 4
• Strony: 257--260
• Opis fizyczny: Bibliogr. 9 poz., rys.

Twórcy

autor

Wójcik W.

• Institute of Fundamental Technological Research, Polish Academy of Sciences, Świetokrzyska 21,00-049 Warsaw, Poland

autor

Kujawska T.

• Institute of Fundamental Technological Research, Polish Academy of Sciences, Świetokrzyska 21,00-049 Warsaw, Poland

autor

Filipczyński L.

• Institute of Fundamental Technological Research, Polish Academy of Sciences, Świetokrzyska 21,00-049 Warsaw, Poland

Bibliografia

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• 2. Du G., Breazeale M. Theoretical description of a focused Gaussian ultrasonic beam in a nonlinear medium, J. Acoust. Soc. Am., 81,51-57, 1987.
• 3. Du G., Wang E. Generation of harmonics in a Gaussian focused sound field. J. Acoust. Soc. Am., 97, 1486-1488, 1995.
• 4. Filipczyński L.. Etienne J. Theoretical study and experiments on spherical focusing transducers with Gaussian surface velocity distribution, Acustica, 28, 121-128,1973.
• 5. Filipczyński L.. Kujawska T., Wójcik J. Temperature elevation in focused Gaussian ultrasonic beams at various insonation times, Ultrasound in Med. and Biol., 19,667- 679, 1993.
• 6. Filipczyński L.. Kujawska T.. Tymkiewicz R.. Wójcik J. Nonlinear and linear propagation of diagnostic uItrasound pulses, Ultrasound in Med. and Biol., 25, 285- 299,1999.
• 7. Gennain L., Cheeke J. Generation and detection of high order harmonics in liquids using a scanning acoustic microscope, J. Acoust. Soc. Am., 83, 942-949, 1988.
• 8. Wójcik J. Conservation of energy and absorption in acoustic fields for linear and nonlinear propagation, J. Acoust. Soc. Am., 104 (5), 2654-2663, 1998.
• 9. Wójcik 1., A new theoretical basis for numerical simulations of nonlinear acoustic fields, Proceedings 01' the 15 th International Symposium on Nonlinear Acoustics, Goettingen 1999, American Society of Physics, Vol. 524,141-144,2000.