摘要
对假塑性幂律流体在半圆及扁圆形通道中等温充分发展流动问题,用帕坦卡方法作数值分析,半圆形通道直接用极座标体系,扁圆形通道为矩形与圆弧形两部分组合的通道,在两个座标体系内分析,并利用界面连续条件进行耦合求解,计算给出阻力系数fRe,并与圆管及矩形通道阻力系数关系作了比较和讨论。
A numerical simulation with famous Patanker's method is presented for fullydeveloped flow of power law fluid through semicircular duct and flat circular duct, inwhich flow field in semicircular duct is analysed in polar coordinates. Because flat circu-lar duct is made up of a rectangular and two semicirculars,its flow field is analysed in acombined polar and cartesian coordinates. The conjugated problem in joining regionwith continuity boundary condition is specially handled. Extensive results and correla-tions of f Re with the power exponent n and aspect ratio s are given and coomparedwith the fRe values of circular pipe and rectangular duct.
基金
国家自然科学基金
关键词
通道
流动
塑料
模具
幂律流体
numerical simulation
semicircular duct
flat circular duct
fully developed flow
Patanker's method
power law fluid
