Three-Dimensional Flow Calculation in a Textile Dyeing Process

Three-dimensional computational fluid dynamics simulation software provides deeper insight into dye liquor flow through a yarn bobbin and a dyeing vessel in a textile dyeing machine. In these calculations, the flow model is based on the Navier-Stokes equations for turbulent incompressible liquids, in which the yam package is described by a porosity model with the assumption of linear flow through the bobbins. The simulation results provide information on the static pressure and velocity distribution at every part of the dyeing vessel, which agrees with the experimental data obtained from static pressure measurements and from flow profiles in a polyester yam bobbin after treatment in a high temperature water dyeing plant.