A New Algorithm for Non-Newtonian Flow and Its Application in Mould Filling Process

• Published in: Shanghai jiao tong da xue xue bao Vol. 16; no. 1; pp. 1 - 10
• Main Author: 韩先洪 孔啸 周雄辉 李锡夔
• Format: Journal Article
• Language: English
• Published: Heidelberg Shanghai Jiaotong University Press 01.02.2011
• Subjects: Architecture; Computer Science; Electrical Engineering; Engineering; Life Sciences; Materials Science; finite element method; fractional step algorithm; injection molding; non-Newtonian flow; O 373
• ISSN: 1007-1172; 1995-8188
• DOI: 10.1007/s12204-011-1087-6

The simulation of injection molding process requires a stable algorithm to model the molten polymer with non-isothermal non-Newtonian property.In this paper,a staggered and iterative scheme is particularly designed to solve the velocity-pressure-temperature variables.In consideration of the polymer characteristic of high viscosity and low thermal conductivity,the non-Newtonian momentum-mass conservation equations are solved by the Crank-Nicolson method based split （CNBS） scheme,and the energy conservation equation with convective character is discretized by the characteristic Galerkin （CG） method.In addition,an arbitrary Lagrangian Eulerian （ALE） free surface tracking and mesh generation method is introduced to catch the front of the fluid flow.The efficiency of the proposed scheme is demonstrated by numerical experiments including a lid-driven cavity flow problem and an injection molding problem.