Unsteady pressure field around oscillating prism predicted by LES

S. Sakamoto, S. Murakami, S. Kato, A. Mochida

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7 Citations (Scopus)


Unsteady velocity-pressure fields around an oscillating square prism are analyzed by means of Large Eddy Simulation (LES). The accuracy of the numerical results is assessed by comparing them with the experimental results of Bearman et al.[3]. The prism is forced to oscillate in a sinusoidal motion in the x2 (lateral) direction. In order to incorporate the influence of the body motion, an inertia force term, whose magnitude is equal to the acceleration of the body, but with the opposite sign, is added to the transport equation of u2, as an external force at each grid point of the fluid. The reduced velocity, Uo/NpD, in this study ranges from 7.5 to 10.0. It was confirmed that the numerical results successfully reproduce the lock-in phenomena in this range. Furthermore, the results of LES showed a good agreement with the results of experiment, in terms of: 1. 1) the phase angle between the displacement of the oscillating prism and the negative pressure acting on the side face, and 2. 2) the correlation between pressures across the side face.

Original languageEnglish
Pages (from-to)551-556
Number of pages6
JournalJournal of Wind Engineering and Industrial Aerodynamics
Issue numberC
Publication statusPublished - 1993 Jan 1
Externally publishedYes

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Renewable Energy, Sustainability and the Environment
  • Mechanical Engineering


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