Verification of the modified model of drying process of a polymer liquid film on a flat substrate by experiment (3) - using organic solvent

2007 ◽  
Author(s):  
Hiroyuki Kagami
Keyword(s):  
Organic Solvent ◽  
Liquid Film ◽  
Drying Process ◽  
Modified Model ◽  
Polymer Liquid ◽  
Flat Substrate

Fundamental understanding of removal of liquid thin film trapped between fibers in the paper drying process: A microscopic approach

TAPPI Journal ◽  
2020 ◽  
Vol 19 (5) ◽  
pp. 249-258
Author(s):  
ZAHRA NOORI ◽  
JAMAL S. YAGOOBI ◽  
BURT S. TILLEY
Keyword(s):  
Thin Film ◽  
Liquid Film ◽  
Thin Liquid Film ◽  
Bound Water ◽  
Free Water ◽  
Intermediate Stage ◽  
Convective Drying ◽  
Drying Process ◽  
Paper Drying ◽  
Vof Model

In the fabrication of paper, a slurry with cellulose fibers and other matter is drained, pressed, and dried. The latter step requires considerable energy consumption. In the structure of wet paper, there are two differ-ent types of water: free water and bound water. Free water can be removed most effectively. However, removing bound water consumes a large portion of energy during the process. The focus of this paper is on the intermediate stage of the drying process, from free water toward bound water where the remaining free water is present on the surfaces of the fibers in the form of a liquid film. For simplicity, the drying process considered in this study corresponds to pure convective drying through the paper sheet. The physics of removing a thin liquid film trapped between fibers in the paper drying process is explored. The film is assumed to be incompressible, viscous, and subject to evaporation, thermocapillarity, and surface tension. By using a volume of fluid (VOF) model, the effect of the previously mentioned parameters on drying behavior of the thin film is investigated.

Disjoining pressure measurements using a microfabricated groove for a molecularly thin polymer liquid film on a solid surface

2004 ◽  
Vol 121 (9) ◽  
pp. 4358-4363 ◽  
Author(s):  
Kenji Fukuzawa ◽  
Jun Kawamura ◽  
Takanori Deguchi ◽  
Hedong Zhang ◽  
Yasunaga Mitsuya
Keyword(s):  
Liquid Film ◽  
Solid Surface ◽  
Disjoining Pressure ◽  
Pressure Measurements ◽  
Polymer Liquid ◽  
Thin Polymer
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