Probing and Manipulating Heat Transfer in Nanofluids and Nanoemulsion Fluids

0730963探测和操纵纳米流体和纳米乳剂中的传热由于观察到纳米流体和纳米乳剂具有优越的热性能，因此人们对利用纳米流体和纳米乳剂来应对各种技术中的新挑战产生了极大的兴趣。然而，这些流体中传热的基本机制目前还没有得到很好的理解。对这些流体中能量输运的潜在物理现象进行研究是非常必要的。本研究旨在探讨纳米流体和纳米乳液的宏观热性能与微观结构和动力学之间的基本关系。将开发具有微观结构和动力学控制的模型纳米流体系统。这些模型系统，结合多管齐下的实验表征，将用于解决在理解纳米流体和纳米乳流体中的能量传输过程中存在的争议。对纳米流体和纳米乳化液中热传输物理现象的透彻理解，有助于开发和优化具有显著增强热物理特性的关键重要流体。拟议的研究还寻求将研究和教育结合起来，让学生成为研究伙伴，并参与当地高中教育工作者和学生的外展活动。除了为本项目直接支持的学生提供教育和培训机会外，代表性不足的本科生将通过NIST夏季本科生研究奖学金计划（www.surf.nist.gov）参与本研究。此外，动手演示纳米流体和纳米乳化液将给学生在本科课程（ENME332）。该研究还将利用“ESTEEM”（www.eng.umd.edu/k12/k12_summer-programs.html）外展项目，通过实际实验和现实生活中的例子，激励高中生成为科学家和工程师。

0730963 Probing and Manipulating Heat Transfer in Nanofluids and Nanoemulsion FluidsThere has been enormous interest in using nanofluids and nanoemulsion fluids to meet new challenges in various technologies because of the observed superior thermal properties. However, the fundamental mechanisms of heat transfer in these fluids are currently not well understood. There exists a great need for research to investigate the underlying physical phenomena of energy transport in these fluids. The proposed research aims to explore the fundamental relation between the macroscopic thermal properties and the microscopic structure and dynamics of nanofluids and nanoemulsions. Model nanofluid systems with controlled microstructure and dynamics will be developed. These model systems, combined with a multi-pronged experimental characterization, will be used to resolve the existing controversy in understanding the energy transport process in nanofluids and nanoemulsion fluids. A thorough understanding of physical phenomena of thermal transport in nanofluids and nanoemulsion fluids allows for the development and optimization of critically important fluids with significantly enhanced thermophysical properties.The proposed research also seeks to integrate research and education by involving students as research partners, and by participating in outreach activities for local high school educators and students. Apart from the education and training opportunities for the students directly supported in this project, underrepresented undergraduate students will be involved in this research through the NIST Summer Undergraduate Research Fellowship Program (www.surf.nist.gov). Additionally, hands-on demonstrations of nanofluids and nanoemulsion fluids will be given to students in an undergraduate course (ENME332). The proposed research will also utilize the outreach program ESTEEM (www.eng.umd.edu/k12/k12_summer-programs.html) to motivate high school students with hands-on experiments and real life examples, to become scientists and engineers.