Journal of Advanced Marine Engineering and Technology

The Korean Society of Marine Engineering (한국마린엔지니어링학회)
권호 표지

Application of Subgrid Turbulence Model to the Finite Difference Lattice Boltzmann Method

차분 래티스볼츠만법에 Subgrid 난류모델의 적용

  • 강호근 (경상대학교 해양산업연구소) ;
  • 안수환 (경상대학교 기계항공공학부.농생명과학연구원) ;
  • 김정환 (한국조선기자재연구원)
  • Published : 2006.07.01
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Abstract

Two-dimensional turbulent flows past a square cylinder and cavity noise are simulated by the finite difference lattice Boltzmann method with subgrid turbulence model. The method, based on the standard Smagorinsky subgrid model and a single-time relaxation lattice Boltzmann method, incorporates the advantages of FDLBM for handling arbitrary boundaries. The results are compared with those by the experiments carried out by Noda & Nakayama and Lyn et al. Numerical results agree with the experimental ones. Besides, 2D computation of the cavity noise generated by flow over a cavity at a Mach number of 0.1 and a Reynolds number based on cavity depth of 5000 is calculated. The computation result is well presented a understanding of the physical phenomenon of tonal noise occurred primarily by well-jet shear layer and vortex shedding and an aeroacoustic feedback loop.

Keywords

References

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