Modeling of Roll Coating Phenomena of Magnetohydrodynamic Hybrid Nanomaterial Polymer Under Lubrication Theory

Abstract Coating techniques are broadly used in the production of sticky tapes, plastic films, books, wallpapers and magazines, adhesive tapes as well as the textiles and metals preservation, packaging, materials protection and X‐ray films. The modeling of roll‐over web coating technique is investigated to report the magneto‐hydrodynamic (MHD) viscous hybrid nanofluid impact on the final coating thickness. In the coating industry, the application of nanomaterial over the sheet/substrate has better non‐Newtonian like rheological features as opposed to the ordinary fluid. The dimensionless governing equations are reduced using lubrication approximation theory (LAT) and the exact solutions for velocity and pressure gradient are acquired. To find the flow rate, coating thickness and other mechanical quantities, numerical technique is utilized. The graphs and tables briefly study the impacts of hybrid nanomaterial volume fraction and Hartmann number on the flow and engineering quantities in detail. Hybrid nanomaterial volume fraction under MHD results in higher shear stress and pressure profile, which triggers decline in coating thickness, which may help in achieving efficient coating process and protecting the substrate life.