2012 Fiscal Year Final Research Report

Flow behavior of viscoelastic fluid in high speed planar elongational flow

Research Project

Project/Area Number	23760167
Research Category	Grant-in-Aid for Young Scientists (B)
Allocation Type	Multi-year Fund
Research Field	Fluid engineering
Research Institution	Tsuyama National College of Technology
Principal Investigator	KATO Manabu 津山工業高等専門学校, 機械工学科, 准教授 (20370017)
Project Period (FY)	2011 – 2012
Keywords	非ニュートン流 / 伸張レオメトリー / 平面伸張流動 / コアシース流れ
Research Abstract	It is proposed that the technique to generate planar elongational flow with high elongational rate by using core/sheath flow. In this study we carried out experiments to observe flow behavior for both viscous fluid and viscoelastic fluid in the flow. It is observed for viscoelastic fluid that flow behavior of the core fluid shows four kind of flow patterns from result of flow visualization and velocity profile. Next, we evaluated molecular orientation profile of elongated fluid by using crossed nicols method. As the results, measure of molecular orientation doesn’t depend on the distance to sidewalls of the flow cell in elongational flow region. It is shown that contribution elongational property to the flow can be discuss from results of distribution of molecular orientation along center line of the flow cell.