铸造充型过程模拟新技术研究

Research on New Technique of Mold Filling

铸造充型过程数值模拟计算中 ,速度场和压力场的求解非常重要 .通常求解粘性不可压流体的基本方程 (动量方程及连续性方程 )往往采用SOLA VOF算法 ,但该方法计算精度和速度并不是很好 .本文提出了一种新的计算方法三维近似盒迭代法 (ABX) ,该方法采用混和差分格式离散方程 .实践证明 ,该方法可以准确而迅速地求解N

Calculation of pressure and velocity is very importan t for the simulation of mold filling of castings. Usually SOLA-VOF which is one of the SIMP calculation methods is used to solve the fundamental equations of incompressible viscose fluid (momentum equation and continuity equation), but calculation precision and velocity of the methods are not very good. In thi s paper, a new method Approximate Box Relaxation (ABX) which adopts Hybrid Schem e was put forward. It is proved that the method can solve N-S equations mor e precisely and rapidly.