Multiscale Simulation of History Dependent Flow in Polymer Melt

Details Multiscale Simulation of History Dependent Flow in Polymer Melt Multiscale Simulation of History Dependent Flow in Polymer Melt

2010-12-14

arxiv.org/abs/1012.2973v2

Europhysics Letters 96, 18002 (2011)

Physics

Condensed Matter

Soft Condensed Matter

4 pages, 3 figures

Scientific paper

10.1209/0295-5075/96/18002

We have developed a new multiscale simulation technique to investigate history-dependent flow behavior of entangled polymer melt, using a smoothed particle hydrodynamics simulation with microscopic simulators that account for the dynamics of entangled polymers acting on each fluid element. The multiscale simulation technique is applied to entangled polymer melt flow around a circular obstacle in a two-dimensional periodic system. It is found that the strain-rate history-dependent stress of the entangled polymer melt affects its flow behavior, and the memory in the stress causes nonlinear behavior even in the regions where ${\rm Wi} \le 1$. The spatial distribution of the entanglements $$ is also investigated. The slightly low entanglement region is observed around the obstacle and is found to be broaden in the downstream region.

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