Flow of complex fluids

复杂流体的流动

• 批准号: 4361-2008
• 负责人: James, David
• 金额: $ 2.09万
• 依托单位: University of Toronto
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2012
• 资助国家: 加拿大
• 起止时间: 2012-01-01 至 2013-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=505013
• 关键词: Flow; complex; fluids

Complex fluids are liquids containing suspended particles or dissolved polymer chains, which generally cause flow behaviour to be frustratingly different than that of simple fluids like water and gasoline. Some common complex fluids are shampoo, ketchup and blood, and some industrially important ones are paints and agricultural sprays. The general objective with these viscoelastic fluids is to understand the underlying physics, to characterize the flow resistance, and to develop the descriptive equations. My specific objective is to characterize the flow resistance to stretching or elongational motion, for shearing resistance has already been well established. In recent work toward the objective, we developed a technique to measure the stretching resistance of barely elastic liquids such as inkjet inks. The novel technique was patented and has been proven useful for the liquid whitener applied on bond paper, enabling improved efficiency in papermaking. We now want to apply this technique to other barely elastic liquids such as paints, with the goal of enabling new 'improved' formulations to be evaluated in the laboratory instead of trying them on the production line.

复杂流体是含有悬浮颗粒或溶解的聚合物链的液体，其通常导致流动行为与水和汽油等简单流体的流动行为不同。 一些常见的复杂流体是洗发水，番茄酱和血液，一些工业上重要的是油漆和农业喷雾剂。这些粘弹性流体的一般目标是了解基本的物理特性，表征流动阻力，并开发描述性方程。 我的具体目标是描述拉伸或伸长运动的流动阻力，因为剪切阻力已经很好地建立起来。 在最近的工作目标，我们开发了一种技术来测量几乎没有弹性的液体，如喷墨油墨的拉伸阻力。这项新技术已获得专利，并已被证明可用于在证券纸上应用的液体增白剂，从而提高造纸效率。 我们现在希望将这项技术应用于其他几乎没有弹性的液体，如油漆，目标是使新的“改进”配方能够在实验室中进行评估，而不是在生产线上进行试验。