Journal of Korea Foundry Society (한국주조공학회지)

Korea Foundry Society (한국주조공학회)
권호 표지

Mold Filling Simulation with Cut Cell in the Cartesian Grid System

직교 격자 계에서 주조 유동 시뮬레이션의 정확한 해석 방법

  • Choi, Young-Sim (Korea Institute of Industrial Technology, Center for e-Design) ;
  • Nam, Jeong-Ho (Korea Institute of Industrial Technology, Center for e-Design) ;
  • Hong, Jun-Ho (Korea Institute of Industrial Technology, Center for e-Design) ;
  • Hwang, Ho-Young (Korea Institute of Industrial Technology, Center for e-Design)
  • 최영심 (한국생산기술연구원, 사이버설계지원 센터) ;
  • 남정호 (한국생산기술연구원, 사이버설계지원 센터) ;
  • 홍준호 (한국생산기술연구원, 사이버설계지원 센터) ;
  • 황호영 (한국생산기술연구원, 사이버설계지원 센터)
  • Published : 2009.02.20
Download PDF
⟨ Previous Next ⟩

Abstract

Cartesian grid system has mainly been used in the casting simulation even though it does not nicely represent sloped and curved surfaces. These distorted boundaries cause several problems. A special treatment is necessary to clear these problems. In this paper, we propose a new method that can consider the cutting cells which are cut by casting and mold based on the partial cell treatment (PCT). This method provides a better representation of geometry surface and will be used in the computation of velocities that are defined on the cell boundaries in the Cartesian grid system. Various test examples for several casting process were computed and validated. The analysis results of more accurate fluid flow pattern and less momentum loss owing to the stepped boundaries in the Cartesian grid system were confirmed. By using the cut cell method, performance of computation gets better because of reducing the whole number of meshes.

Keywords

References

  1. M. Delanaye, A. Patel, B. Leonard, and C. Hirsch : 'ECCOMAS CFD 2001', Institution of Mathematics and its application, "Automatic unstructured hexahedral grid generation and flow solutions", Southern-on-Sea, UK, 2001
  2. D. M. Ingram, D. M. Causon, and C. G. Mingham : Mathematics and Computers in Simulation, "Developments in Cartesian cut cell methods", 61 (2003) 561-572 https://doi.org/10.1016/S0378-4754(02)00107-6
  3. C. P. Hong, S. Y. Lee, and K. Song : ISIJ International, "Development of a new simulation method of mold filling based on a body-fitted coordinate system", 41(9) (2001) 999-1005
  4. S. Y. Lee et al.: 11th Int. Conf. on 'Modeling of Casting, Welding and Advanced Solidification Processes', "Mold filling simulation based on the body fitted coordinate system in an unstructured grid system", Opio, France, June 2006, Gandin and Bellet, 95-102
  5. Q. JJ : Computers & Fluids, "An alternative to unstructured grids for computing gas dynamics flows around arbitrarily complex two-dimensional bodies", 23(1) (1994) 125-142 https://doi.org/10.1016/0045-7930(94)90031-0
  6. P. Lin : Computers & Fluids, "A fixed-grid model for simulation of a moving body in free surface flows", 36 (2007) 549-561 https://doi.org/10.1016/j.compfluid.2006.03.004
  7. P. G. Tucker and Z. Pan : Applied Mathematical Modelling, "A Cartesian cut cell method for incompressible viscous flow", 24 (2000) 591-606 https://doi.org/10.1016/S0307-904X(00)00005-6