Wall slip during the flow of carbopol solutions through a parallel plate channel

被引：0

作者：

Mendes, Paulo R. de Souza ^{[1
]}

Pedron, Jonathan ^{[2
]}

Pereira, Renata A. B. ^{[1
]}

机构：

[1] Pontificia Univ Catolica Rio de Janeiro, Dept Mech Engn, Rua Marques Sao Vicente 225, BR-22453900 Rio De Janeiro, Brazil

[2] Univ Technol Belfort Montbeliard, Dept Mech Engn & Concept, F-9000 Belfort, France

来源：

XVTH INTERNATIONAL CONGRESS ON RHEOLOGY - THE SOCIETY OF RHEOLOGY 80TH ANNUAL MEETING, PTS 1 AND 2 | 2008年 / 1027卷

关键词：

wall slip; viscoplastic liquids; parallel plate channel flow;

D O I：

暂无

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Experiments were performed to investigate the phenomenon of wall slip during the flow of aqueous solutions of carbopol through a parallel plate channel. The Reynolds number is low for all cases investigated, to ensure negligible development length. In the experiments, the pressure drop is measured for different flow rate values, and the results are presented in the form of curves of dimensionless average velocity versus dimensionless wall shear stress. We also performed experiments with glycerol, and the results agreed with the analytical solution available in the literature. Moreover, this agreement ensures the absence of wall slip for this Newtonian case. Comparisons between the experimental and numerical results show that (apparent) wall slip occurs when the wall shear stress is below a threshold stress of a few times the yield stress. Above this threshold, the numerical and experimental curves tend to merge.

引用

页码：1378 / +

页数：2