격자 볼츠만법을 이용한 자유수면 시뮬레이션 기법 연구

다국어 초록 (Multilingual Abstract)

The numerical simulation using the Lattice Boltzmann Method in the field of computational fluid dynamics becomes wider in the engineering applications because of its simple update rules and easy implementation rather than the Navier-Stokes equation. Freesurface treatment of the dam breaking solved by the incompressible LBM has been implemented in the paper. The two dimensional LB model with nine velocities using the single relaxation time is applied under the gravitational field where applied only in the fluid because of its big density difference. At the free surface, the reconstruction techniques in combination with boundary conditions is adopted in order to get some distribution function coming into the fluid site from the air one, and surface tension is considered in it. With the implementation of the gravitational profile, conserving the overall mass and grid dependency are observed during the calculations and freesurface advance track is well captured with an experiment.

목차 (Table of Contents)

• 요약
• 1. 서론
• 2. 자유수면 해석을 위한 격자볼츠만방법(Lattice-Boltzmann Method, LBM)
• 3. 계산사례
• 4. 결론
• 후기
• 참고문헌