유체기계공업학회:학술대회논문집
- 유체기계공업학회 2003년도 유체기계 연구개발 발표회 논문집
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- Pages.671-677
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- 2003
차분격자볼츠만법에 의한 Edge음의 직접계산
Direct Simulation of Edge Tones by the Finite Difference Lattice Boltzmann Method
- 발행 : 2003.12.05
초록
Two-dimensional direct numerical simulation of the edge-tones by the finite difference lattice Boltzmann method (FDLBM) is presented. We use a new lattice BGK compressible fluid model that has an additional term and allow larger time increment comparing the conventional FDLBM, and also use a boundary fitted coordinates. We have succeeded in capturing very small pressure fluctuations result from periodically oscillation of jet around the edge. That pressure fluctuations propagate with the sound speed. It is clarified that the sound wave generated in rather wide region and individual vortices do not affect the sound wave propagation.