Atika Farooq2025-11-262025-11-262023https://escholar.umt.edu.pk/handle/123456789/12965In this thesis, when the web passes through a small gap between the two rigid rollers, a mathematical model of forward roll coating of a thin film of a viscoplastic material onto a moving porous web is studied. The law of conservation of mass and momentum in the light of lubrication theory are nondimensionalized and solutions for the velocity profile, flow rate, pressure distribution are calculated numerically by using Range-Kutta-Fehlberg’s method. It has been depicted that by altering (increasing/decreasing) the value of involved parameters, we can control the engineering quantities like velocity distribution, flow rate, pressure distribution, and penetration depth. Engineers working in the coating industries can utilize these results and can compare the results with the experimental data. Some results are shown graphically. It is found that the involved parameter is an element to control coating thickness, flow rate, and pressure-distribution.enThesis