Numerical simulation of the blade coating processes using viscoelastic fluid with heat transfer analysis

Abstract The blade coating is an essential industrial technique that involves applying a protective liquid layer to a moving surface with a smoothing blade. In this article we demonstrated the non‐isothermal analysis of blade coating using viscoelastic fluid model numerically. The flow equations are made simplify using lubrication approximation theory (LAT). The resulting dimensionless flow and energy equations are simulated using a robust fourth‐order Runge–Kutta and Newton–Raphson methods to calculate the coating thickness (), stream function, velocity pressure, temperature profile, pressure gradient and blade load. The impact of the slip and involved parameters on these quantities are deliberated through various graphs and tables. The temperature distribution increases as the Brinkman number rises, with the maximum temperature occurring in the nip region of the flow. The mechanical quantities such as coating thickness increases while the blade load decreases with increasing the values of the slip parameter as compared with Newtonian model for both plane and exponential coater. Highlights The temperature distribution increases as the Brinkman number increases. The coating thickness increases as the slip parameter value increases, while the blade load decreases. The pressure profile shows an increasing trend with increasing the values of the blade height ratio (K). The pressure profile increases with increasing the values of α1 while its shows decreasing trend with increases the value of the α2.