Abstract
Macrosegregation, i.e., the inhomogeneous distribution of solute concentration, exists in various alloys solidification process and it deteriorates the materials mechanical performance. Generally, orthogonal grids were used to numerically simulate the fluid flow and macrosegregation of casting. However, the non-orthogonal grids are flexible in treatment of the boundary fitness for the irregular geometry. In this research, multiphase macrosegregation model is developed by coupling nucleation and growth of grains on microscopic level with macroscopic transportation based on non-orthogonal grids. Firstly, driven skewed cavity flow problem is applied as a benchmark to test the performance on non-orthogonal grids. Then, a two-phase modeling of macrosegregation for Pb-48wt.%Sn in a two-dimensional rectangle cavity, H-H benchmark, is studied. The numerical results with comparison of practical measurement exhibit the great potential of non-orthogonal grids in modeling of macrosegregation in complex geometry such as in steel ingots.
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Tu, W., Li, W., Shen, H., Liu, B. (2014). Numerical Simulation of Macrosegregation with Multiphase Model and Non-Orthogonal Grids. In: TMS 2014: 143rd Annual Meeting & Exhibition. Springer, Cham. https://doi.org/10.1007/978-3-319-48237-8_37
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DOI: https://doi.org/10.1007/978-3-319-48237-8_37
Publisher Name: Springer, Cham
Print ISBN: 978-3-319-48593-5
Online ISBN: 978-3-319-48237-8
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