Journal of the Korean Society of Propulsion Engineers (한국추진공학회지)

The Korean Society of Propulsion Engineers (한국추진공학회)
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A Numerical Validation for Incompressible Two-phase Flow using CLSVOF and Artificial Compressibility Methods

CLSVOF과 가상압축성 기법을 이용한 비압축성 2상 유동 수치해석 검증 연구

  • Yoo, Young-Lin (School of Aerospace and Mechanical Engineering, Korea Aerospace University) ;
  • Choi, Jeong-Yeol (Department of Aerospace Engineering, Pusan National University) ;
  • Sung, Hong-Gye (School of Aerospace and Mechanical Engineering, Korea Aerospace University)
  • Received : 2017.03.03
  • Accepted : 2017.05.12
  • Published : 2017.10.01
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Abstract

A numerical analysis of the liquid-gas two-phase flows has been conducted. The incompressible equations of the two-phase flows were solved by the artificial compressibility method with the CLSVOF interface capturing method. To analyze the grid dependency of CLSVOF, a numerical analysis of Zalesak's disk and three-dimensional liquid deformation problem were carried out, and the reconstruction of deformation was investigated. The Rayleigh-Taylor instability was numerically analyzed by applying the equations of incompressible two-phase flow, and the surface instability was observed.

액체-기체의 2상 유동에 대한 수치해석 기법을 연구하였다. 비압축성 방정식에는 가상 압축성 기법을 적용하였으며 LS와 VOF를 합친 CLSVOF 기법을 적용하여 액체-기체 경계면을 추적하였다. CLSVOF의 격자 의존도를 파악하기 위해 h=1/64, 1/128, 1/128, 그리고 1/160의 격자로 Zalesak's disk 문제와 액체의 3차원 변형 문제의 수치해석을 실시했으며 격자가 최대 보존 오차에 미치는 영향을 조사하였다. 비압축성 2상 유동 방정식을 적용하여 Rayleigh-Taylor 불안정성에 대한 수치해석을 실시하였고 밀도 차에 의한 액체 표면 불안정성이 나타난다는 것을 알 수 있었다.

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References

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