Abstract
Liquid permeability of the mushy zone is important for porosity formation during the solidification process. In order to investigate the permeability of the mushy zone, an integrated model was developed by combining the phase field model and computational fluid dynamics (CFD) model. The three-dimensional multigrain dendrite morphology was obtained by using the phase field model. Subsequently, the computer-aided design (CAD) geometry and mesh were generated based on calculated dendrite morphologies. Finally, the permeability of the dendritic mushy zone was obtained by solving the Navier-Stokes and continuity equations in ANSYS Fluent software. As an example, the dendritic mushy zone permeability of Al-4.5wt%Cu alloy and its relationship with the solid fractions were studied in detail. The predicted permeability data can be input to the solidification model on a greater length scale for macro segregation and porosity simulations.
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This work was financially supported by the National Key Research and Development Program of China (No.2016YFB0700503), National Natural Science Foundation of China (No.51701013), Funds from Beijing Laboratory of Metallic Materials and Processing for Modern Transportation.
Rui-jie Zhang Male, born in 1977, Associate Professor, His researches focus on the multi-scale modeling for solidification and solid state phase transformation.
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Li, Lf., Zhang, Rj., Hu, Sj. et al. Prediction of mushy zone permeability of Al-4.5wt%Cu alloy during solidification by phase field model and CFD simulation. China Foundry 16, 313–318 (2019). https://doi.org/10.1007/s41230-019-9039-0
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DOI: https://doi.org/10.1007/s41230-019-9039-0