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Theoretical analysis of blade coating process using simplified Phan‐Thien‐Tanner fluid model: An analytical study
Author(s) -
Khaliq Sabeeh,
Abbas Zaheer
Publication year - 2021
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.25576
Subject(s) - materials science , coating , dimensionless quantity , viscoelasticity , rheology , lubrication , mechanics , lubrication theory , blade (archaeology) , fluid bearing , composite material , mechanical engineering , physics , engineering
A mathematical model of blade coating is developed to study the rheological and viscoelastic effects of a Simplified Phan‐Thien‐Tanner fluid passing through the narrow gap between the blade and moving substrate. First, a dimensionless analysis is conducted on the governing system and simplified by utilizing the lubrication approximation theory. The perturbation method is adopted to solve the resulting non‐linear system. The impact of parameters Wi (Weissenberg number), ε , and γ (normalized coating thickness) on the velocity and pressure profiles are elaborated through graphs, while coating thickness and load are shown in tabular form. The results exhibit that the viscoelastic effects have a significant influence on the pressure and load on the blade as they lead to the thickness and better coating quality and improves the life of the moving substrate.