Numerical prediction of locally forced turbulent boundary layer

Gwang Hoon Rhee, Hyung Jin Sung

Research output: Contribution to journalArticlepeer-review

10 Scopus citations


An unsteady numerical simulation was performed to analyze flow structure behind a local suction/blowing in a flat-plate turbulent boundary layer. The local forcing was given to the boundary layer flow by means of a sinusoidally oscillating jet. A version of the unsteady k-ε-fμ model [Fluid Dyn. Res. 26 (6) (2000) 421] was employed. The Reynolds number based on the momentum thickness was about Reo = 1700. The forcing frequency was varied in the range 0.011 ≤f+≤0.044 with a fixed forcing amplitude Ao = 0.4. The predicted results were compared and validated with the experimental data. It was shown that the unsteady locally forced boundary layer flow is predicted well by the k-ε-fμ model. The time-dependent numerical flow visualizations were demonstrated during one period of the local forcing. The effect of the pitch angle of local forcing on the reduction of skin friction was examined.

Original languageEnglish
Pages (from-to)624-632
Number of pages9
JournalInternational Journal of Heat and Fluid Flow
Issue number6
StatePublished - Dec 2001


  • Drag reduction
  • Local forcing
  • Turbulent boundary layer


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