Start-up of flow of a FENE-fluid through a 4:1:4 constriction in a tube

被引：46

作者：

Szabo, P ^{[1
]}

Rallison, JM ^{[1
]}

Hinch, EJ ^{[1
]}

机构：

[1] UNIV CAMBRIDGE,DEPT APPL MATH & THEORET PHYS,CAMBRIDGE CB3 9EW,ENGLAND

来源：

JOURNAL OF NON-NEWTONIAN FLUID MECHANICS | 1997年 / 72卷 / 01期

关键词：

viscoelastic flow; 4:1:4 contraction/expansion; FENE; finite element method; Lagrangian formulation;

D O I：

10.1016/S0377-0257(97)00023-2

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

The flow of a FENE-fluid through a 4:1:4 constriction in a tube is computed by a split Lagrangian-Eulerian finite element method. In steady flow it is found that the upstream vortex grows with increasing Deborah number, while the down-stream vortex diminishes and disappears. The steady pressure drop decreases with Deborah number unless the finite extensibility L is quite small. Starting from rest at high Deborah number, the upstream vortex grows in two stages, each with their own time scales. A simple model of this growth is proposed. (C) 1997 Elsevier Science B.V.

引用

页码：73 / 86

页数：14

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