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논문 기본 정보

자료유형
학술대회자료
저자정보
Van-Tu Nguyen (Pusan National University) Duc-Thanh Vu (Pusan National University) Warn-Gyu Park (Pusan National University)
저널정보
한국전산유체공학회 한국전산유체공학회 학술대회논문집 한국전산유체공학회 2014년도 국제학술대회 논문집
발행연도
2014.10
수록면
85 - 90 (6page)

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An implicit algorithm based on the unsteady three-dimensional (3-D) incompressible Navier-Stokes equations is developed to simulate water-entry flows. The numerical algorithm employs a dual-time preconditioned method with multi-block and parallel computing to improve computational productivity. To handle the motion of an object in the water-entry problem, the Navier-Stokes solver is dynamically integrated to a six-degree-of-freedom (6DOF) rigid body motion model and a moving Chimera grid scheme. The Chimera domain decomposition scheme uses an overlapping, embedding, and moving approach to facilitate the flow simulations of arbitrary translational and rotational complex geometries among various computational blocks. The domain-communication module is fully parallel and is ideally suited for handling moving body problems. Calculations were performed first for vertical water-entry problems of a hemisphere and a cone. The numerical scheme was then employed for the simulation of inclined cylinder free-falling into the water. The present results are compared with available experimental data and other numerical and theoretical results. The good agreement between these results demonstrates the capability of the methodology.

목차

Abstract
1. Introduction
2. Governing Equations
3. Chimera Grid
4. Results and Discussions
5. Conclusions
6. References

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