2-D fluid dynamics in yarn package dyeing

초록

Knitted fabrics are very stylish and flexible, which consists of the various yarns. To make some knitted fabrics, therefore, the levelness of yarn is one of the important properties. It is well known that the fluid dynamic behavior in the yarn dyeing machine greatly affects the levelness of the yarn package dyeing. In real dyeing process, dyers change the shape of the yarn package to achieve the levelness. Although a flow model should include a correlation between package density and permeability, we simplify the model without the consideration of them, to optimize the angle α of the yarn package. Because the focus of this study is just to understand the effect of angle α on the dynamic flow behavior in yarn package dyeing.