Numerical simulation of melting process in single-screw extruder under vibration force field

作者：Feng, Yan-Hong^*; Qu, Jin-Ping; Liu, Bin; He, He-Zhi; Jin, Gang; Zou, Xin-Liang

来源：Journal of South China University of Technology(Natural Science Edition), 2006, 34(9): 104-110.

• Dynamic melting
• Non-isothermal viscoelastic constitutive model
• Numerical simulation
• Relaxation time spectrum
• Single screw
• Vibration force field

In order to investigate the effect of vibration force field on the melting process in a single-screw extruder, a simplified 2D dynamic melting model is established by adopting the assumption of ';flowing solid'; and the theory of hydrokinetics to solve the problem in the whole melting region. Thus, the problems of phase change and the solid-melt interface track are successfully solved. Moreover, as the melting process is of a non-isothermal phase change and the polymer presents time-dependent nonlinear viscoelastic characteristics in vibration force field, a self-amended non-isothermal Maxwell viscoelastic constitutive model that reflects the relaxation time spectrum of the polymer is developed. The dynamic melting process is finally simulated, followed by the analysis of the effects of vibration frequency and amplitude on the melting process.

• 出版日期2006-9
• 单位华南理工大学