Stepwise increase in the Strouhal number for flows around flat plates

Shigehira Ozono, Yuji Ohya, Yasuharu Nakamura, Ryuzo Nakayama

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

The unsteady viscous flow around flat plates with square leading and trailing edges is investigated by using a finite difference computation of the incompressible two‐dimensional Navier‐Stokes equations. The chord‐to‐thickness ratio of a plate ranges from d/h=3 to 9, with a Reynolds number based on the plate's thickness equal to 103. The numerical analysis confirms the finding obtained in our previous experiment that vortex shedding from flat plates with square leading and trailing edges is caused by the impinging shear layer instability. The Strouhal number based on the plate's chord increases stepwise with increasing d/h in accordance with the experiment. The numerical analysis also gives some crucial information on the complicated vortical flow occurring near the trailing edge. Finally, the mechanism of the impinging shear layer instability is discussed in the light of the experimental and numerical findings.

Original languageEnglish
Pages (from-to)1025-1036
Number of pages12
JournalInternational Journal for Numerical Methods in Fluids
Volume15
Issue number9
DOIs
Publication statusPublished - Nov 15 1992

All Science Journal Classification (ASJC) codes

  • Computational Mechanics
  • Mechanics of Materials
  • Mechanical Engineering
  • Computer Science Applications
  • Applied Mathematics

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