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Mold Filling Simulation with Cut Cell in the Cartesian Grid System  

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)
Publication Information
Journal of Korea Foundry Society / v.29, no.1, 2009 , pp. 33-37 More about this Journal
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
Cartesian grid system; Computational fluid dynamics; Body-fitted coordinate system; Cut cell; Momentum loss;
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