High Deborah Number Flows of Viscoelastic Liquids in Long Tubes with Geometrically Complex Cross-Sections

具有复杂几何截面的长管中粘弹性液体的高德博拉数流动

• 批准号: 9320037
• 负责人: Arkady Leonov
• 金额: $ 28.42万
• 依托单位: University of Akron
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1994
• 资助国家: 美国
• 起止时间: 1994-03-15 至 1998-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9320037&HistoricalAwards=false
• 关键词: Deborah; Number; Flows; Viscoelastic; Liquids

9320037 Leonov A combination of theoretical and experimental research will be conducted to describe secondary laminar flow of viscoelastic fluids in channels with non-circular cross-sections. Rectangular, elliptical, and trapezoidal sections are to be imvestigated. The theoretical models for the fluid will be the Giesekus model and one developed by the Principal Investigator. The numerical simulation will be with Finite Elements. The experiments will be with several non-Newtonian liquids, to be rheologically characterized. Measurements will be with LDV and birefringence techniques. Secondary flow can occur in internal flow passages such as occur in molding and extrusion of polymeric materials. It affects processing pressures and the final shape of manufactured parts. ***

9320037 Leonov 将进行理论和实验研究相结合的研究来描述非圆形横截面通道中粘弹性流体的二次层流。 矩形、椭圆形和梯形截面均需进行研究。流体的理论模型将是由首席研究员开发的 Giesekus 模型。 数值模拟将使用有限元。实验将使用几种非牛顿液体进行流变学表征。测量将使用 LDV 和双折射技术。 二次流动可发生在内部流动通道中，例如发生在聚合物材料的模制和挤出中。它影响加工压力和制造零件的最终形状。 ***