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

A New Algorithm for Non-Newtonian Flow and Its Application in Mould Filling Process
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摘要 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. 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.
作者 韩先洪 孔啸 周雄辉 李锡夔
机构地区 National Die and Mould CAD Engineering Research Center State Key Laboratory of Structural Analysis of Industrial Equipment
出处 《Journal of Shanghai Jiaotong university(Science)》 EI 2011年第1期1-10,共10页 上海交通大学学报（英文版）
基金 the National Natural Science Foundation of China(No. 50873060) the YuYao Technology Division Grand Science and Technology Special Project
关键词 non-Newtonian flow injection molding finite element method fractional step algorithm non-Newtonian flow injection molding finite element method fractional step algorithm
分类号 O373 [理学—流体力学]
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参考文献18

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Journal of Shanghai Jiaotong university(Science)
2011年 第1期

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