Effects of shear thinning on forward roll coating
File(s)
Author(s)
Hewson, RW
Kapur, N
Type
Journal Article
Abstract
This paper described the forward mode roll coating process of generalised non-Newtonian fluids characterised by the Ellis model. The fluid in the coating bead and the free surface formation are described by the lubrication approximation and the stability is also considered using a perturbation analysis of the downstream meniscus. Results highlight the complex behaviour of this coating process and volume flow rate and film thickness results are obtained for a range of operating conditions. The stability of the downstream meniscus is observed to improve with increasing level of shear thinning when τ1/2 (the shear stress at which the viscosity is half that of the zero shear stress viscosity) is small, however as τ1/2 increases the meniscus stability decreases with increasing levels of shear thinning. © 2013.
Date Issued
2013-04-11
Date Acceptance
2013-04-02
Citation
Chemical Engineering Research and Design, 2013, 91 (12), pp.2427-2436
ISSN
0263-8762
Publisher
Elsevier
Start Page
2427
End Page
2436
Journal / Book Title
Chemical Engineering Research and Design
Volume
91
Issue
12
Copyright Statement
© 2013, Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/
Copyright URL
Publication Status
Published