Numerical Simulation of the Non-Isothermal Co-Extrusion Fiber Spinning with Flow-Induced Crystallization


1 Facultad de Estudios Superiores Zaragoza, UNAM, Batallón del 5 de Mayo s/n, esquina Fuerte de Loreto, Col. Ejercito de Oriente, Delegación Iztapalapa, C. P., 09320, Ciudad de México, Mexico

2 ESIME Azcapotzalco, Instituto Politécnico Nacional, Avenida de las Granjas No. 682, Colonia Santa Catarina, Delegación Azcapotzalco, Ciudad de México, 02250 Mexico

3 ESIME-Zacatenco, Instituto Polit´ecnico Nacional, U.P. Adolfo López Mateos, Col. Lindavista, Del. Gustavo A. Madero, Ciudad de México,

4 ESIME-Azcapotzalco, Instituto Polit´ecnico Nacional, Av. de las Granjas 682, Col. Santa Catarina, Del. Azcapotzalco, Ciudad de México


In this work, the numerical simulation of the non-isothermal steady co-extrusion fiber spinning with flow-induced crystallization is explored. The model is based on the formulation originally proposed by China et al. in which Newtonian and Phan-Thien-Tanner (PTT) fluids are considered the core and the skin layer, respectively. The polymeric flow rate fraction, Deborah dimensionless number and the PTTs parameters on the temperature, the velocity and the crystallization profiles are analyzed. The numerical results show: the temperature profile is sensitive to the polymeric layer flow rate and the deformation parameters (shear thinning and extensional), the tensile stress induced crystallization parameter has a strong influence at the onset of the process, increasing drastically temperature and crystallinity.