Numerical analysis of blade coating of a third-order fluid. (April 2019)

• Record Type: Journal Article
• Authors: Bhatti, Saira; Zahid, Muhammad; Rana, Muhammad Afzal; Siddiqui, Abdul Majeed; Abdul Wahab, Hafiz
• Is Part Of: Journal of plastic film and sheeting. Volume 35:Number 2(2019:Apr.)
• Page Start: 157
• Page End: 180
• Publication Date: 2019-04
• Subjects: Non-Newtonian fluid -- steady flow -- blade coater -- lubrication approximation -- perturbation method -- approximate analytical solutions; City planning -- Bibliography -- Periodicals; 668.495
• DOI: 10.1177/8756087918822155
• Languages: English
• ISSNs: 8756-0879

Abstract

In this study, the blade coating process of a third-order fluid has been investigated. Flow between the narrow channel formed by the rigid blade and the web is generated due to the web motion and the constant pressure gradient. The governing equations of motion are simplified using lubrication approximation theory. We obtained analytical solutions for velocity field, pressure distribution, pressure gradient and coating thickness using perturbation method. How the model's dimensionless parameters affect velocity, pressure gradient, pressure and coating thickness are presented graphically and in tabulated form. We found that the third-order parameter provides a mechanism to control velocity, pressure, power input and the final coating thickness.