Aeolian tones radiated from flow past two square cylinders in a side-by-side arrangement

O. Inoue, Wakana Iwakami, N. Hatakeyama

Research output: Contribution to journalArticle

46 Citations (Scopus)

Abstract

The sound generated by two square cylinders placed in a side-by-side arrangement in a uniform flow at low Mach numbers is studied by direct solution of the two-dimensional unsteady compressible Navier-Stokes equations. Special attention is paid to the effect of the spacing between the two cylinders on the generation mechanism of the sound. Results show that sound pressure fields as well as flow fields show different features depending on the spacing; six different wake patterns (nonsynchronized, antiphase and in-phase synchronized, flip-flopping, single bluff-body, and steady patterns) are observed and, depending on the wake pattern, sound pressure fields also show different features. Two types of bifurcation phenomenon are observed where two different wake patterns exist for the same spacing and either of the two patterns appears depending on an initial condition; different sound pressure fields appear in response to the wake patterns. Results also show that Curle's dipole solution does not predict well the direct numerical simulation results in the antiphase-synchronized pattern at a small spacing and the flip-flopping pattern, but that it gives a good approximation in the nonsynchronized, in-phase-synchronized, and single-bluff-body patterns.

Original languageEnglish
Article number046104
JournalPhysics of Fluids
Volume18
Issue number4
DOIs
Publication statusPublished - 2006 Apr
Externally publishedYes

Fingerprint

aeolian tones
Acoustic waves
wakes
sound pressure
pressure distribution
spacing
bluff bodies
Direct numerical simulation
Navier Stokes equations
Mach number
Flow fields
uniform flow
acoustics
direct numerical simulation
Navier-Stokes equation
flow distribution

ASJC Scopus subject areas

  • Mechanics of Materials
  • Computational Mechanics
  • Physics and Astronomy(all)
  • Fluid Flow and Transfer Processes
  • Condensed Matter Physics

Cite this

Aeolian tones radiated from flow past two square cylinders in a side-by-side arrangement. / Inoue, O.; Iwakami, Wakana; Hatakeyama, N.

In: Physics of Fluids, Vol. 18, No. 4, 046104, 04.2006.

Research output: Contribution to journalArticle

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