Journal of the Korean Society of Visualization (한국가시화정보학회지)

The Korean Society of Visualization (한국가시화정보학회)
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Effects of Synthetic Turbulent Boundary Layer on Fluctuating Pressure on the Wall

합성난류경계층이 벽면에서의 변동압력에 미치는 영향

  • Yi, Y.W. (School of Mech. Eng., Pusan Nat. Univ.) ;
  • Lee, D.S. (Agency for Defense Dev.) ;
  • Shin, K.K. (Agency for Defense Dev.) ;
  • Hong, C.S. (School of Mech. Eng., Ulsan College) ;
  • Lim, H.C. (School of Mech. Eng., Pusan Nat. Univ.)
  • Received : 2021.11.27
  • Accepted : 2021.12.09
  • Published : 2021.12.31
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Abstract

Large Eddy Simulation (LES) has been popularly applied and used in the last several decades to simulate turbulent boundary layer in the numerical domain. A fully developed turbulent boundary layer has also been applied to predict the complicated wake flow behind bluff bodies. In this study we aimed to generate an artificial turbulent boundary layer, which is based on an exponential correlation function, and generates a series of realistic three-dimensional velocity data in two-dimensional inlet section which are correlated both in space and in time. The results suggest its excellent capability for high Reynolds number flows. To make an effective generation, a hexahedral mesh has been used and Cholesky decomposition was applied to possess suitable turbulent statistics such as the randomness and correlation of turbulent flow. As a result, the flow characteristics in the domain and fluctuating pressure near the wall are very close to those of fully developed turbulent boundary layers.

Keywords

Acknowledgement

본 논문의 주요 내용은 국방과학연구소의 지원을 받아 수행되었습니다(UD190002DD).

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