TY  - EJOU
AU  - Guo, Hui-Fen  
AU  - Xu, Bin-Gang  

TI  - A 3D Numerical Model for a Flexible Fiber Motion in Compressible Swirling Airflow
T2  - Computer Modeling in Engineering \& Sciences

PY  - 2010
VL  - 61
IS  - 3
SN  - 1526-1506

AB  - A numerical method is developed for modeling the dynamics of a flexible fiber immersed in a compressible swirling flow. The modeling approach is based on combining an Eulerian finite volume formulation for the fluid flow and a Lagrangian small-deformation formulation for the dynamics of the fiber. The fiber is modeled as a chain of beads connected through mass-less rods. The bending and twisting deformation of the fiber are represented by the displacements of the successive beads. A computational strategy is proposed for the computation of the fluid parameters at the center of discrete fiber sections. To deal with the fiber-wall interaction, a wall model is also developed. The new algorithm was verified against the experimental observations using high-speed photography. The proposed model has also been applied in a textile process to simulate the fiber motions in the two nozzles (i.e., cylindrical and diverged conical tubes, respectively) of an air-jet spinning machine, and consequently, the principle of the air-jet yarn formation can be demonstrated.
KW  - compressible swirling flow
KW  -  dynamic analysis
KW  -  fiber motion
KW  -  nozzle

DO  - 10.3970/cmes.2010.061.201