U.S.-Japan Cooperative Science: A Computational Study of Bubble and Drop Dynamics in Inelastic and Viscoelastic Non-Newtonian Fluid Systems

0242524 Sussman该奖项支持佛罗里达州立大学的Mark Sussman教授和日本北海道室兰工业大学的Mitsuhiro Ohta教授之间为期两年的国际合作研究项目。 他们将在非弹性和粘弹性非牛顿流体系统中进行气泡和液滴动力学的计算研究。 研究人员建议将牛顿多相流中复杂移动边界问题的数值方法扩展到非牛顿多相流，在软件中实现这些方法，并根据相关实验对流动进行计算模拟。 这些问题在工业中很重要。 例如，对微尺度喷射装置（例如喷墨装置）中的流体的破裂进行建模，对提取过程中的气泡和液滴的聚结进行建模，以及对挤出过程进行建模。 数值验证研究和与实验的比较将被用来测试非牛顿本构关系的有效性。 该项目汇集了两个具有互补专业知识和研究能力的实验室的努力。 美国研究人员提供数值分析方面的专业知识，日本研究人员提供实验领域的专业知识。 全尺寸、三维、直接数值模拟的喷射和挤出过程将直接适用于喷墨打印机和纤维纺丝设备的设计，并提供有价值的洞察到非牛顿流体的流动不稳定性和界面形态。 该项目通过一些研究生的参与促进国际人力资源。 通过交流思想和技术，该项目将扩大我们的基础知识，促进国际理解与合作。 研究结果将在科学会议上和科学计算、非牛顿流体力学和化学工程的科学杂志上传播。

0242524SussmanThis award supports a two-year international collaborative research project between Professor Mark Sussman at Florida State University and Professor Mitsuhiro Ohta of the Muroran Institute of Technology in Hokkaido, Japan. They will undertake a computational study of bubble and drop dynamics in inelastic and viscoelastic non-Newtonian fluid systems. The researchers propose to extend numerical methods for complex moving boundary problems in Newtonian multi-phase flow to non-Newtonian multi-phase flows, implement the methods in software, and conduct computational simulations of the flows in the light of relevant experiments. These problems are important in industry. For example, modeling the break-up of fluids in microscale jetting devices (e.g. ink-jet devices), modeling coalescence of bubbles and drops in extraction processes, and modeling extrusion processes. Numerical validation studies and comparison with experiments will be used to test the validity of non-Newtonian constitutive relations. The project brings together the efforts of two laboratories that have complementary expertise and research capabilities. The U.S. researchers provide expertise in numerical analyses and the Japanese researchers provide expertise in the experimental areas. The full scale, three dimensional, direct numerical simulations of jetting and extrusion processes will have direct applicability in the design of ink-jet printers and fiber spinning apparatus and provide valuable insight into the flow instability and interfacial morphology of the non-Newtonian fluids. The project advances international human resources through the participation of a number of graduate students. Through the exchange of ideas and technology, this project will broaden our base of basic knowledge and promote international understanding and cooperation. Results of the research will be disseminated at scientific meetings and in scientific journals on scientific computing, non-Newtonian fluid mechanics and chemical engineering.