Development of technique to generate high elongation rate in planar elongation flow by flow focusing.

• Project/Area Number: 21560167
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Fluid engineering
• Research Institution: Nagaoka University of Technology
• Principal Investigator: TAKAHASHI Tsutomu 長岡技術科学大学, 工学部, 教授 (20216732)
• Project Period (FY): 2009 – 2011
• Project Status: Completed (Fiscal Year 2011)
• Budget Amount: ¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000); Fiscal Year 2011: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000); Fiscal Year 2010: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000); Fiscal Year 2009: ¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
• Keywords: 非ニュートン流動 / 伸張流動 / 平面伸張流動 / 非ニュートン流 / 伸張速度 / 平面伸張粘度 / フローフォーカッシング

Research Abstract

The planar elongation flow is one of the important flow field to form thin film and PET bottle formation process. The flow field of a steady planar elongation with high elongation rate was generated by using the flow focusing technique with sheath flow. In order to generate the higher elongation rate, a new device which combines a flow driving piston with a test section were developed and the ability was confirmed. In addition, the planar elongation stress was evaluated by using the channel that was 180 turns while a regular expansion was flowing.