摘要
用有限元法模拟了 Carreau流体在 4∶ 1平板收缩口模中的非等温挤出流动。采用 3节点的三角形单元对速度、压力和温度进行等阶插值 ,运用特殊的罚函数处理流体的不可压缩条件 ,解决了压力场的数值振荡问题 ,并用改进的 Newton迭代法对非线性方程进行求解 ,成功地计算了 Carreau流体在平板收缩流动中的速度、压力、粘度以及应力的分布 ,同时得到温度场的分布。计算的应力分布与实验的结果及
planar contraction flows of non-isothermal Carreau fluid was simulated with finite element method (FEM). The 3-node triangle elements were used to employ the equal-order interpolation on velocity, pressure and temperature. A special penalty function was used in finite element formulation to treat the incompressibility constraint of fluid. A modified Newton iteration method was used to calculation nonlinear equations. The velocity, pressure, viscosity and stress distribution were successfully calculated for 2-D contraction flows. The temperature field of non-isothermal flows was also calculated. The agreement of the calculated stress at re-entrant corner with Renardy′s asymptotic analysis results indicated the reasonableness of present simulation. Comparisons were further carried on between calculated stress and the experiment results from Martyn et al.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2003年第1期15-19,共5页
Polymer Materials Science & Engineering
基金
国家自然科学基金资助项目 ( 2 963 40 43 - 2 )
