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학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
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Numerical simulations for the flows containing free surface remain difficult problems because the drastic differences of physical properties of water and air, The difference of densities makes the solution instable in particular. For the stabilities of the solutions, the most typical methods to simulate free surface flows, such as Volume Of Fluid(VOF) and Level-Set(LS) methods, impose transient zones where the physical prosperities are continuously distributed. The thickness of the transient zone is the source of the numerical errors. The other side, marker-density method does not use such a transient zone. In the traditional marker-density method, however, the air velocities of free surface cells are extrapolated from the water velocity, and the pressures on the free surface are extrapolated from the air pressures for the stability of the solution. In this study, the marker-density method is modified for the decrease of such numerical errors. That is, the pressure on the free surface is determined to coincide with the pressure gradient terms of the governing equations, and the velocity of free surface cells are calculated with the governing equations. Two-dimensional steady spilling breakers behind of a submersed hydrofoil and three-dimensional spilling breaker near a wedge shaped ship model are simulated using INHAWAVE-II including the modified marker-density(MMD) method. The results are compared with the results of Fluent V6.3 including VOF method and several published research results.
목차
1. 서론
2. 수치기법
3. 수치시뮬레이션
5. 결론
References
참고문헌 (20)
참고문헌 신청
1. [보고서] - Baba / 1969 / Study on Separation of Ship Resistance Components : 59 ~
2. [학술지(정기간행물)] - Duncan, J. H. / 1983 / The Breaking and Non-Breaking Wave Resistance of a Two-Dimensional Hydrofoil / Journal of Fluid Mechanics 126 : 507 ~ 520
3. [학술지(정기간행물)] - Duncan, J. H. / 2001 / Spilling Breakers / Annual Review of Fluid Mechanics 33 : 519 ~ 547
4. [단행본] - Fergizer & Peric / 2002 / Computational Methods for Fluids Dynamics / Springer
5. [학술지(정기간행물)] - Hirt, C.W. / 1981 / Volume of Fluid(VOF)method for the dynamics of free boundaries / Journal Computational Physics 39 : 201 ~ 225
2. [학술지(정기간행물)] - Duncan, J. H. / 1983 / The Breaking and Non-Breaking Wave Resistance of a Two-Dimensional Hydrofoil / Journal of Fluid Mechanics 126 : 507 ~ 520
3. [학술지(정기간행물)] - Duncan, J. H. / 2001 / Spilling Breakers / Annual Review of Fluid Mechanics 33 : 519 ~ 547
4. [단행본] - Fergizer & Peric / 2002 / Computational Methods for Fluids Dynamics / Springer
5. [학술지(정기간행물)] - Hirt, C.W. / 1981 / Volume of Fluid(VOF)method for the dynamics of free boundaries / Journal Computational Physics 39 : 201 ~ 225
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