Flow-History-Dependent Behavior in Entangled Polymer Melt Flow with Multiscale Simulation

Abstract

Polymer melts represent the flow-history-dependent behavior. To clearly show this behavior, we have investigated flow behavior of an entangled polymer melt around two cylinders placed in tandem along the flow direction in a two dimensional periodic system. In this system, the polymer states around a cylinder in downstream side are different from the ones around another cylinder in upstream side because the former ones have a memory of a strain experienced when passing around the cylinder in upstream side but the latter ones do not have the memory. Therefore, the shear stress distributions around two cylinders are found to be different from each other. Moreover, we have found that the averaged flow velocity decreases accordingly with increasing the distance between two cylinders while the applied external force is constant. While this behavior is consistent with that of the Newtonian fluid, the flow-history-dependent behavior enhances the reduction of the flow resistance.

6 pages, 3 figures, Proceedings of 5th International Mini-Symposium on Liquids

References in corpus (2)

• Multiscale Simulation of History Dependent Flow in Polymer Melt
• Single Chain Slip-Spring Model for Fast Rheology Simulations of Entangled Polymers on GPU

Cited by in corpus (5)

• Synchronized molecular-dynamics simulation for the thermal lubrication of a polymeric liquid between parallel plates
• Synchronized molecular dynamics simulation via macroscopic heat and momentum transfer: an application to polymer lubrication
• Multiscale simulation of a polymer melt flow between two coaxial cylinders under nonisothermal conditions
• Synchronized molecular dynamics method for thin-layer flows of complex fluids
• Multiscale Simulation of Entangled Polymer Melt with Elastic Deformation