Time-dependent extrudate-swell flows with slip boundary conditions: Finite difference method and slip-based Reynolds number effects

Key Points

• Extrudate-swell flows exhibit significant alterations under slip boundary conditions, emphasizing the role of molecular interactions.
• The study finds that varying the slip-based Reynolds number affects the flow behavior considerably, particularly in high shear scenarios.
• Assessment using a finite difference method reveals how time dependency impacts flow characteristics and stability.
• These insights underline the necessity for further investigation into boundary condition effects for enhanced predictive capabilities in materials processing.