Simulating fiber motion in the airflow in a rotor spinning unit

In this study, a numerical model for simulation of fiber motion in the transport channel of a rotor spinning unit has been developed. A chain represents the fiber consisting of a series of cylindrical rods connected with beads. The fiber model is applied on the turbulent airflow field of the transport channel to present fiber configuration at different times. Results show that the airflow field in the transport channel has a great impact on fiber configuration. The vortex generated in the channel inlet tends to cause a hook on the fiber leading end. As the leading end escapes from the vortex and moves downwards the transport channel, the accelerating air will facilitate fiber straightening.