The KSFM Journal of Fluid Machinery (한국유체기계학회 논문집)

Korean Society for Fluid machinery (한국유체기계학회)
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Stress Based Node Refill Model for Lattice-Boltzmann Method on Fluid-Structure Interaction Problems

격자 볼츠만 법의 유체 구조 연성해석 적용에 대한 응력 기반 격자 재생성 모델

  • 신재호 (한양대학교 기계공학과 대학원) ;
  • 이상환 (한양대학교 기계공학부) ;
  • 이주희 (호서대학교 메카트로닉스공학과)
  • Received : 2011.09.01
  • Accepted : 2012.04.02
  • Published : 2012.06.01
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Abstract

The Lattice Boltzmann Method has developed for solving the Boltzmann equation in Cartesian domains containing immersed boundaries of arbitrary geometrical complexity moving with prescribed kinematics. When a immersed boundaries are sweeping the fixed fluid node, refilling the node information in a vicinity of fluid nodes is one of the important issues in Lattice Boltzmann Method. In this study, we propose a simple refill algorithm for the particle distribution function based on a proper velocity, density and strain rate to enhance accuracy and stability of the method. The refill scheme based on a asymptotic analysis of LBGK model has improved accuracy than interpolation schemes. The proposed scheme in this study is validated by the simulations of an impulsively started rotating circular cylinder to investigate adaptability for fluid-structure interaction (FSI) problem. This refill scheme has improved stability and accuracy especially at high Reynolds number region.

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References

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