Creeping flow of viscoplastic materials through a planar expansion followed by a contraction

被引：24
|
作者：
Naccache, Monica F. [1 ]
Barbosa, Rafael S. [1 ]
机构：
[1] Pontificia Univ Catolica Rio de Janeiro, Dept Engn Mech, BR-22453 Rio De Janeiro, Brazil
来源：
MECHANICS RESEARCH COMMUNICATIONS | 2007年 / 34卷 / 5-6期
关键词：
planar extension/contraction; viscoplastic materials;
D O I：
10.1016/j.mechrescom.2007.06.003
中图分类号：
O3 [力学];
学科分类号：
08 ; 0801 ;
摘要：
In this work, the creeping flow of a viscoplastic fluid through a planar channel with an expansion followed by a contraction is analyzed numerically. The solution of the conservation equations of mass and momentum is obtained via the finite volume method. In order to model the non-Newtonian behavior of the fluid, it was used the generalized Newtonian fluid constitutive equation. The viscosity function was the one proposed by Souza Mendes and Dutra [Souza Mendes, P.R., Dutra, E.S.S., 2004. Viscosity function for yield-stress liquids. Appl. Rheol. 14, 296-302]. The yielded and unyielded regions are obtained for several combinations of theological parameters. The influence of these parameters on pressure drop through the cavity is also obtained and analyzed. (c) 2007 Elsevier Ltd. All rights reserved.
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页码：423 / 431
页数：9
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