Abstract
The flow characteristics of the coating film on the cylindrical filament is an important factor affecting the quality of the coating, and it has a wide range of application prospects in engineering applications. Existing researches mainly focus on analyzing the flow pattern characteristics of liquid film on cylindrical filaments, but there is still a lack of research on the dynamic evolution of liquid film with different filament diameters. With the increase of the flow rate, the liquid flow characteristics of different filament diameters are transformed from zone C to zone B, and then into zone A, which is in the conversion mode of C-B-A, but the critical flow rate of transition between C-B-A zones increases with the filament the diameter increases and decreases. As the viscosity of the liquid increases, the droplet spacing will stabilize at about 5.3mm after a certain flow rate. The flow rate of the liquid will decrease significantly as the viscosity of the liquid increases. On this basis, the spatial-temporal diagram was drawn to reveal the dynamic evolution law of the flow of high-viscosity liquid on the filament. This research will enrich and perfect the dynamic theory of film flow on cylindrical filaments, and propose new methods for controlling interface stability and dynamic behavior.
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