(哈尔滨工业大学材料科学与工程学院，哈尔滨150001)
摘 要: 采用改进后的SOLA-VOF方法处理自由表面，有效地克服了传统的SOLA-VOF法中的“施体-受体”法在处理三维自由表面时精度差和时间步长小的缺点。在自由表面处理上采用了新的压力插值函数，使三维自由表面的处理变得简单明了。用有限差分法建立了铸件三维充型过程流动与传热的耦合计算数值模型，并对大型薄壁铝合金铸件进行了数值计算。后处理中采用插值技术，直观地显示了充填过程中自由表面的位置和形状。
关键字: 大型薄壁件；SOLA-VOF；流体流动；传热
（School of Materials Science and Engineering, Harbin Institute o f Technology, Harbin 150001, P.R.China）
Abstract:The numerical model for 3D fluid flow coupled with heat transfer was established with FDM and the free surfaces were handled by an improved SOLA-VOF technique. A pressure interpolation function was adopted as the free surface boundary condition. The example of large thin-wall Al-alloy casting was calculated with this model. In the post-processing, the location and shape of free surfaces during mold filling were displayed visually with a linear interpolation method.
Key words: large thin-wall castings; SOLA-VOF; fluid flow; heat transfer
