基于界面追踪-动网格技术模拟凝固收缩下Fe-C合金宏观偏析

董士虎, 张红伟, 吕文朋, 雷洪, 王强

Numerical Simulation on Macrosegregation in Fe-C Alloy Under Solidification Shrinkage Through Interface Tracking-Dynamic Mesh Technique

DONG Shihu, ZHANG Hongwei, LÜ Wenpeng, LEI Hong, WANG Qiang

图7 耦合考虑热-溶质浮升力+凝固收缩下收缩腔形成过程

Fig.7 Formation of shrinkage cavity by consideration of shrinkage + buoyancy (left—liquid volume fraction, right—relative concentration distribution of C (t—time) (a) t = 50 s (b) t = 1050 s (c) locally enlarged part of Fig.7b (Δy1—shrinkage height at stage I, Δy2—shrinkage height at stage II) (d) t = 3700 s (e) t = 14200 s (f) t = 22000 s