Numerical simulation and modeling of viscous fluid residence time distribution in the melt spinning pack

Abstract

AbstractMelt spinning is an important method in fiber production. The hydrodynamic performance of fluid in the melt spinning process's core device, spinning pack, can directly affect the quality of fiber products. To guarantee the uniform distribution of flow in the spinning pack, the residence time distribution (RTD) characteristics of high viscosity fluid in the spinning pack were investigated experimentally and numerically in this work. Peak and trailing of RTD curves indicate the existence of short circuit and dead zone in the spinning pack. Results show that the porous media and gland can reduce the dead zone, and baffles could reduce the short circuit. Based on the experiment and numerical simulation results, a one‐dimensional axial diffusion model was established to describe the RTD characteristics of viscous fluid in the spinning pack. This work can be valuable references for the understanding and optimization of the spinning pack in melt spinning process.