ENTRY AND EXIT FLOWS OF BINGHAM FLUIDS

被引：119

作者：

ABDALI, SS ^{[1
]}

MITSOULIS, E ^{[1
]}

MARKATOS, NC ^{[1
]}

机构：

[1] NATL TECH UNIV ATHENS,DEPT CHEM ENGN,COMPUTAT FLUID DYNAM UNIT,GR-15773 ATHENS,GREECE

来源：

JOURNAL OF RHEOLOGY | 1992年 / 36卷 / 02期

关键词：

D O I：

10.1122/1.550350

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

Entry and exit flows through extrusion dies are studied numerically for Bingham fluids exhibiting a yield stress. A constitutive equation proposed by Papanastasiou is used, which applies everywhere in the flow field in both yielded and practically unyielded regions. The emphasis is on determining the extent and shape of unyielded/yielded regions along with the extrudate swell (contraction) for planar and axisymmetric dies. The results for pressure are used to determine the excess pressure losses that give rise to entrance, exit, and the total end (or Bagley) correction.

引用

页码：389 / 407

页数：19

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