Misting of Newtonian Liquids in Forward Roll Coating

2011 ◽  
Vol 50 (6) ◽  
pp. 3212-3219 ◽  
Author(s):  
Michael S. Owens ◽  
Madhu Vinjamur ◽  
L. E. Scriven ◽  
C. W. Macosko
Keyword(s):  
Roll Coating ◽  
Newtonian Liquids ◽  
Forward Roll Coating

Misting of non-Newtonian liquids in forward roll coating

2011 ◽  
Vol 166 (19-20) ◽  
pp. 1123-1128 ◽  
Author(s):  
Michael S. Owens ◽  
Madhu Vinjamur ◽  
L.E. Scriven ◽  
C.W. Macosko
Keyword(s):  
Roll Coating ◽  
Newtonian Liquids ◽  
Forward Roll Coating

Ribbing Instability Analysis of Forward Roll Coating

2009 ◽  
Vol 25 (2) ◽  
pp. 167-175
Author(s):  
K. N. Lie ◽  
Y. M. Chiu ◽  
J. Y. Jang
Keyword(s):  
Surface Coating ◽  
Velocity Ratio ◽  
Rolling Process ◽  
Linear Stability Theory ◽  
Wave Number ◽  
Roll Coating ◽  
Critical Capillary Number ◽  
Roll Velocity ◽  
Forward Roll Coating ◽  
Numerical Program

AbstractThe ribbing instability of forward roll coating is analyzed numerically by linear stability theory. The velocity ratio of two rolls is fixed to be 1/4 for practical surface coating processes. The base flows through the gap between two rolls are solved by use of powerful CFD-RC software package. A numerical program is developed to solve the ribbing instability for the package is not capable of solving the eigenvalue problem of ribbing instability. The effects of the gap between two rolls, flow viscosity, surface tension and average roll velocity on ribbing are investigated. The criterion of ribbing instability is measured in terms of critical capillary number and critical wave number. The results show that the surface coating becomes stable as the gap increases or as the flow viscosity decreases and that the surface coating is more stable to the ribbing of a higher wave number than to the ribbing of a lower wave number. The effect of average roll velocity is not determinant to the ribbing instability. There are optimum and dangerous velocities for each setup of rolling process.

Gravure roll coating of newtonian liquids

1991 ◽  
Vol 46 (3) ◽  
pp. 751-756 ◽  
Author(s):  
R. Patel ◽  
H. Benkreira
Keyword(s):  
Roll Coating ◽  
Newtonian Liquids

Forward roll coating flows of viscoelastic liquids

2005 ◽  
Vol 130 (2-3) ◽  
pp. 96-109 ◽  
Author(s):  
G.A. Zevallos ◽  
M.S. Carvalho ◽  
M. Pasquali
Keyword(s):  
Coating Flows ◽  
Roll Coating ◽  
Viscoelastic Liquids ◽  
Forward Roll Coating
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