Heat Transfer and Fluid Flow in Micro and Mini Scale Devices

微型和微型设备中的传热和流体流动

• 批准号: RGPIN-2016-04172
• 负责人: Muzychka, Yuri
• 金额: $ 2.4万
• 依托单位: Memorial University of Newfoundland
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2017
• 资助国家: 加拿大
• 起止时间: 2017-01-01 至 2018-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=638414
• 关键词: Heat; Transfer; Fluid; Flow; Micro; Heat; Transfer; Fluid; Flow; Micro

This proposal is concerned with the development of robust models for predicting the thermal-fluid performance characteristics of complex internal flow systems. Simple and complex flow architecture is found in compact heat transfer devices for refrigeration, electronics cooling, automotive cooling, solar heating, and in countless other process flows. Complex flows are also found in new compact energy devices such as fuel cells, micro-fluidic “lab on chip” devices, micro-systems, MEMS, and other next generation technologies. There is a need for fundamental study, both theoretical and experimental, to better ascertain the performance characteristics and to develop predictive models for use in specialized or generic simulation codes. This proposal aims to study several fundamental problems now facing designers of systems utilizing compact and micro-flow architecture. Several focus areas have been chosen for this grant cycle. These include: single and two phase flow in micro- and mini-channels for use in compact and enhanced heat transfer devices and experimental and theoretical modelling of heat transfer and fluid flow in electronics packaging systems. These devices promote heat transfer through two ways, namely, increased heat transfer coefficients and increased surface area. The penalty for enhancing heat transfer in a compact heat exchanger is increased pressure drop or reduced mass flow rate for fixed pressure drop. The proposed research involves theoretical and experimental analysis of the thermal and hydrodynamic characteristics of complex internal flows and parallel development of optimized flow architectures. Optimum design of compact heat transfer devices is best achieved when accurate models are available for predicting the thermal-hydraulic performance of a particular device geometry. Finally, the engineer needs to optimize these designs considering many parameters, such as size (weight and volume) and cost, in addition to the required heat transfer and pumping power. The design of new devices using modern methods such as Entropy Generation Minimization or Constructal Theory is also actively pursued. These methods when applied to finite systems, allow for the optimal distribution of material and give the system freedom to morph under the fixed constraints of pressure drop, surface area, and volume. Applications of the proposed research include improving performance of energy systems, heat recovery, and thermal management of electronics and electronics systems. Significant progress in these areas has been made during the last cycle, leading to approximately 40 archival journal publications and the completion of 3 PhD and 2 Master's theses. It is expected that the new problems being considered in this proposal will be equally fruitful.

该建议涉及用于预测复杂内部流动系统的热流体性能特征的强大模型的发展。简单而复杂的流程结构可在紧凑的传热设备中发现，以用于制冷，电子冷却，汽车冷却，太阳能加热以及无数其他工艺流动。在新的紧凑型能源设备（例如燃料电池，微氟中的“芯片上的实验室”设备，微型系统，MEM和其他下一代技术）中还发现了复杂的流。理论和实验性的基础研究都需要更好地确定性能特征，并开发用于在专业或通用仿真代码中使用的预测模型。该建议旨在研究使用紧凑和微流架构的系统设计师现在面临的几个基本问​​题。在此赠款周期中选择了几个重点领域。其中包括：微型和迷你通道中的单相流量和两相流，用于紧凑和增强的传热设备，以及电子包装系统中传热和流体流量的实验和理论建模。这些设备通过两种方式促进传热，即增加传热系数并增加表面积。在紧凑的热交换器中增强传热的惩罚是增加压降或固定压降的质量流量降低。拟议的研究涉及对复杂内部流的热力学特征和水力动力特征的理论和实验分析以及优化流量结构的并行发展。当可以使用精确的模型来预测特定设备几何形状的热功能性能时，最好实现紧凑型传热设备的最佳设计。最后，除了所需的传热和抽水功率外，工程师还需要考虑许多参数，例如大小（重量和体积）和成本等许多参数。还可以积极追求使用现代方法（例如熵产生最小化或构造理论）设计新设备的设计。这些方法应用于有限系统时，允许材料的最佳分布，并在压降，表面积和体积的固定限制下使系统自由变形。拟议研究的应用包括提高能源系统的性能，热恢复和电子和电子系统的热管理。在上一个周期中，这些领域的取得了重大进展，导致大约40个档案期刊出版物以及3个博士学位和2个硕士论文的完成。预计该提案中考虑了新问题将同样富有成果。