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<p>The results of a&#xa0;numerical study of the acoustic streaming caused by a&#xa0;broadband ultrasonic signal with a&#xa0;limited spectrum and amplitude are presented. The analytically and numerically calculated acoustic radiation forces are compared. The numerical calculations and modeling of the broadband acoustic signal are carried out using the finite difference method in the time domain to solve the Navier-Stokes, the continuity equations, and the ideal gas state for the adiabatic process equation. It is shown that at small amplitudes and insignificant nonlinear signal distortions in the air, the broadband signal does not cause a&#xa0;more significant effect on the acoustic streaming than does the harmonic signal. However, with an increase in amplitude and strong nonlinear signal distortion in the medium, the broadband signal allows increasing the acoustic streaming velocity relative to the harmonic signal of the same energy.</p>

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Numerical modeling of the acoustic streaming force induced by a wideband ultrasound wave

  • 期刊论文

  • 发表日期：

    2025年8月1日

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  • A. E. Kuzovova,
  • D. Ya. Sukhanov,
  • S. N. Roslyakov

摘要

The results of a numerical study of the acoustic streaming caused by a broadband ultrasonic signal with a limited spectrum and amplitude are presented. The analytically and numerically calculated acoustic radiation forces are compared. The numerical calculations and modeling of the broadband acoustic signal are carried out using the finite difference method in the time domain to solve the Navier-Stokes, the continuity equations, and the ideal gas state for the adiabatic process equation. It is shown that at small amplitudes and insignificant nonlinear signal distortions in the air, the broadband signal does not cause a more significant effect on the acoustic streaming than does the harmonic signal. However, with an increase in amplitude and strong nonlinear signal distortion in the medium, the broadband signal allows increasing the acoustic streaming velocity relative to the harmonic signal of the same energy.