Flow-History-Dependent Behavior of Entangled Polymer Melt Flow Analyzed by Multiscale Simulation

• DOI: 10.1143/jpsjs.81sa.sa013
• Publication Date: 2012-10-23T02:44:12Z
• Authors: Takahiro Murashima; Takashi Taniguchi
• Keywords: 02 engineering and technology; 0210 nano-technology

Polymer melts exhibit flow-history-dependent behavior. To clearly show this behavior, we have investigated the flow behavior of an entangled polymer melt around two cylinders placed in tandem along direction a two-dimensional periodic system. In system, states cylinder on downstream side differ from those upstream because former memory strain they experienced when passing but latter no such memory. Therefore, shear stress distributions are found to differ. Moreover, that mean velocity decreases accordingly with increasing distance between cylinders, whereas applied external force is constant. Although consistent Newtonian fluid, enhance reduction resistance. We also discussed microscopic during flow, observing length chains, number entanglements, and degree orientation which represented reflects each relaxation process.