Computation of bio-fluid sounds

Youngmin Bae, Young June Moon

Research output: Contribution to journalArticle

Abstract

A hybrid method is proposed for prediction of bio-fluid sounds at very low Mach numbers. The unsteady hydrodynamic flow field is computed by the incompressible Navier-Stokes equations (INS), while the sound field is obtained by solving the linearized perturbed compressible equations (LPCE) with sound sources represented by a total derivative of the hydrodyanmic pressure, DP/Dt. With the present INS/LPCE hybrid method, the vocal sound in human larynx and the buzz sound of bumblebee are computed with more clear understanding on the sound generation processes associated with their characteristic motions such as the self-sustained oscillatory motions of the vocal folds and the figure-eight motion of the flapping wings.

Original languageEnglish
Pages (from-to)475-496
Number of pages22
JournalInternational Journal of Aeroacoustics
Volume10
Issue number4
DOIs
Publication statusPublished - 2011 Aug 1

Keywords

  • INS/LPCE Hybrid Method
  • Low Subsonic Flow Noise

ASJC Scopus subject areas

  • Aerospace Engineering
  • Acoustics and Ultrasonics

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