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

Kang Ho-Keun (경상대학교 해양산업연구소)
Ahn Soo-Whan (경상대학교 기계항공공학부.농생명과학연구원)
Kim Jeong-Whan (한국조선기자재연구원)
Publication Information
Journal of Advanced Marine Engineering and Technology / v.30, no.5, 2006 , pp. 580-588 More about this Journal
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
FDLBM; Turbulent flow; Flow-induced noise; Subgrid model;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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