Entrance flow simulation using elongational properties of plastics

被引：0
|
作者：
Gupta, M [1 ]
机构：
[1] Michigan Technol Univ, Dept Mech Engn Engn Mech, Houghton, MI 49931 USA
来源：
ANTEC '99: PLASTICS BRIDGING THE MILLENNIA, CONFERENCE PROCEEDINGS, VOLS I-III: VOL I: PROCESSING; VOL II: MATERIALS; VOL III: SPECIAL AREAS; | 1999年
关键词：
elongational viscosity; extensional viscosity; extrusion; entrance flow;
D O I：
暂无
中图分类号：
TQ [化学工业];
学科分类号：
0817 ;
摘要：
A finite element simulation of the flow in a channel with an abrupt contraction is presented. Effects of hear and elongational viscosities of a polymer on the entrance flow is analyzed. The shear and elongational viscosities are represented by the truncated power-law model. The power-law index for the elongational viscosity is independent of-the value of the power-law index for the shear viscosity. It is confirmed that Trouton ratio is important in determining the recirculating vortex and the extra pressure loss in entrance flow.
引用
收藏
页码：1254 / 1258
页数：5
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