Streak-Line Defect Minimization in Multi-Layer Slide Coating Systems

Thin film flow on surfaces containing arbitrary occlusions

“…The mismatch between the four level refinement multigrid solution and COMSOL is around 2% of the overall free-surface variation. Since the position of the static contact line is sensitive to the imposed contact angle condition [22] this small discrepancy could be due to either the inability within COMSOL to control precisely the mesh distribution close to the occlusion and/or the way the contact angle condition is embodied within the discretisation methods. Finally, the efficiency of the solution methods is compared in Table 3.…”

“…The finite element method too has shown itself to be well-suited to the solution of coating and spreading flows, having been employed for more than two decades to solve a variety of viscous, free-surface industrial coating problems, [20][21][22][23][24][25]. Consequently, this type of numerical analogue is now gaining popularity as a method for solving the weak form of the lubrication equation for thin film free-surface flows.…”

Coupled fluid‐particle modeling of a slot die coating system

“…However the flow of particles and fluid was not fully coupled, and presence of free surface was not studied . The presence of free surfaces in coating systems affect particle motion and deposition sites . Particle laden flows in processes with free surfaces experience particle growth near the free surface and static contact lines in slide coating .…”

Drying air-induced disturbances in multi-layer coating systems

“…The factors leading to defects in the wet coating phase have recently been considered by Gaskell et al (1999), Noakes et al (2002a) and Ikin et al (2007). This paper focuses on the defects that arise in the drying phase of, for example, multilayer curtain or slide-bead coating systems, when the drying air emerges from an array of slot nozzles arranged perpendicular to the machine direction and disturbs the surface of the wet coating.…”