• Title/Summary/Keyword: 비압축성 입자완화유체동역학

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Comparison of Fluid Modeling Methods Based on SPH and ISPH for a Buoy Design for a Wave Energy Converter (파력발전기 부유체설계를 위한 SPH와 ISPH 유체모델링 기법 비교)

  • Jun, Chul-Woong;Sohn, Jeong-Hyun;Yang, Min-Seok
    • Journal of the Korean Society of Manufacturing Process Engineers
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    • v.16 no.3
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    • pp.94-99
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    • 2017
  • The buoy of the wave energy converter moves by direct contact with the fluid. In order to design a buoy by using the numerical method, it is necessary to analyze not only the contact with the fluid but also the exact behavior of the fluid. In this paper, differences between weakly compressible smoothed particle hydrodynamics (WCSPH) and incompressible smoothed particle hydrodynamics (ISPH) are compared and analyzed for two-dimensional dam breaking simulation. ABAQUS, which is a commercial analysis program, is used for WCSPH analysis. A laboratory code is developed for ISPH analysis. The surface shape, the velocity, and the pressure pattern of the fluid are compared. The results of the laboratory code show the similar tendencies with those of ABAQUS, and there is a little difference in the pressure result.

A Case Study of Fluid Simulation in the Film 'Sector 7' (사례연구: 영화 '7광구'의 유체 시뮬레이션)

  • Kim, Sun-Tae;Lee, Jeong-Hyun;Kim, Dae-yeong;Park, Yeong-Su;Jang, Seong-Ho;Hong, Jeong-Mo
    • Journal of the Korea Computer Graphics Society
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    • v.18 no.3
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    • pp.17-27
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    • 2012
  • In this paper, we describe a case study of the film 'Sector 7' which was produced by technologies applied fluid simulation. For the CG scenes in the movie which include highly detailed fluid motions, we used smoothed particle hydrodynamics(SPH) technique to express subtle movements of seawater from a crashed huge tank, and used hybrid simulation method of particles and levelsets to describe bursting water from a submarine's broken canopy. We also used detonation shock dynamics(DSD) technique for detailed flame simulations to produce a burning monster, the film"s main character. At this point, the divergence-free vortex particle method was applied to conserve the incompressible property of fluids. In addition, we used an upsampling method to achieve more efficient video production. Consequently, we could produce the high-quality visual effects by using the domestic technologies.