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Cartesian Grid Method with Cut Cell in the Mold Filling Simulation

Journal of Materials Science & Technology 2008年第3期24卷 379-382页

作者： youngsim choi Junho Hong Hoyoung Hwang Jeongkil choi Center-for e-Design KITECH7-47-Songdo-DongYeonsu-Ku

In this paper, a Cartesian grid method with cut cell has been developed to simulate mold filling of casting process. Cut cells at the cast-mold interface are generated on the Cartesian grid. With the boundary cut cells, a special treatment is necessary. That is Cartesian grid method with cut cell. A simple shape was tested and the cut cell method was compared with the traditional one on Cartesian grids. And, a developed method was applied to the real casting product simulation. Cartesian grid system causes momentum loss and unsound fluid flow patterns because of inaccurate generation of meshes. These problems have been improved by using cut cell method.

关键词： Cartesian grids Cut cell Momentum loss

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Study on accuracy of casting flow simulation

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China Foundry 2017年第5期14卷 333-338页

作者： youngsim choi Jun-Ho Hong Ho-Young Hwang Kyuhong Kim Dept.of Mechanical&Aerospace Engineering Seoul Nat.Univ.Republic of Korea Korea Institute of Industrial Technology(KITECH) Republic of Korea Institute of Advanced Aerospace Technology Seoul Nat.Univ.Republic of Korea

In the field of casting flow simulation, the application of body-fitted coordinate(BFC) has not been widely used due to the difficulty and low efficiency of grid generation, despite the availability of good quality analysis results. Cartesian coordinates, on the other hand, have been used predominantly in casting process simulations because of their relatively easy and fast grid generation. However, Cartesian grid systems cannot obtain accurate results because they cannot express the geometries properly. In this study, Cut Cell method was applied to solve this problem. The three-dimensional incompressible viscous governing equation was analyzed using a function defined for the volume and area of the casting in the cutting cell. Using the Cut Cell method, accurate flow analysis results were also obtained in the Cartesian grid systems. The tests of simple shape and the applications of actual casting product have been tried with Cut Cell method.

关键词： casting flow Cut Cell Cartesian coordinates body-fitted coordinates filling pattern conservationof momentum

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