(哈爾濱工業(yè)大學材料科學與工程學院，哈爾濱150001)
摘 要: 采用改進后的SOLA-VOF方法處理自由表面，有效地克服了傳統(tǒng)的SOLA-VOF法中的“施體-受體”法在處理三維自由表面時精度差和時間步長小的缺點。在自由表面處理上采用了新的壓力插值函數(shù)，使三維自由表面的處理變得簡單明了。用有限差分法建立了鑄件三維充型過程流動與傳熱的耦合計算數(shù)值模型，并對大型薄壁鋁合金鑄件進行了數(shù)值計算。后處理中采用插值技術(shù)，直觀地顯示了充填過程中自由表面的位置和形狀。
關(guān)鍵字: 大型薄壁件；SOLA-VOF；流體流動；傳熱
ZHANG Chun-hui, MA Jian
（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
