SGER: Electrowetting Actuation of Droplets for Cooling of Integrated Circuits

建议编号：CTS-050004主要研究员：莫塞尼，卡姆兰附属：科罗拉多大学博尔德分校建议标题：SGER：用于集成电路冷却的液滴电润湿致动器该奖项授予化学和运输系统司热传输和热处理计划授予的探索性研究小额补助金。热是电子设备正常运行时不可避免的副产品。电路延迟的减少以及因此速度的提高通常是通过更高的电路封装密度伴随着每电路更高的功率消耗来实现的。由于对更高的包装密度和性能的更多需求，所需的热通量清除正在以具有挑战性的速度增加。为此，这一小型探索性研究补助金(SGER)专注于离散液滴的电气调制，用于驱动和泵送液滴，特别是金属/合金，用于紧凑型微型系统的主动热管理和任何固体表面热点的散热。初步计算表明，使用这项技术具有显著的散热能力。智力上的优点：这项工作的目的是提供支持所建议技术的定量数据。所提出的技术基于两个观察结果：(I)通过使用在室温下是液态的金属/合金(而不是空气冷却)，可以显著提高冷却系统的传热率；(Ii)电毛细管是一种高效、低功耗、低电压的微尺度液体泵驱动技术。这一系统的可行性分析将侧重于该项目的两个不同方面。首先，将对电介质(对于导电液体)和介电(对于介质液体)上的电润湿进行建模，以求在给定的驱动电压下液滴的速度和传热率。为了验证这些模型，将进行实验，直接测量各种驱动参数的换热系数和液滴速度。布罗德影响：预计该项目将在紧凑型微系统的新型热管理技术方面取得创新进展。科罗拉多大学博尔德分校现有的学科课程将丰富这项工作的成果，扩大学生对热流体、微制造和数值模拟的多学科接触。在本研究的基础上，展望了紧凑型微系统和微流体的热管理方面的研究进展。这些将在国家会议上和通过期刊出版物广泛传播。

ABSTRACTProposal Number: CTS-050004Principal Investigator: Mohseni, KamranAffiliation: University of Colorado-BoulderProposal Title: SGER: Electrowetting Actuation of Droplets for Cooling of Integrated CircuitsThis award is for a Small Grant for Exploratory Research awarded by the Thermal Transport and Thermal Processing Program of the Division of Chemical and Transport Systems. Heat is an unavoidable byproduct of normal operation of an electronic device. Reduction in circuit delay and therefore an increase in speed are often achieved by higher circuit packaging density accompanied by increased power dissipation per circuit. As a result of more demand for increased packaging density and performance, the required heat flux removal is increasing at a challenging rate. To this end, this Small Grant for Exploratory Research (SGER) is focused on electrical modulation of discrete droplets for actuation and pumping of liquid droplets, in particular metals/alloys, for active thermal management of compact micro systems and heat removal from the hot spots on any solid surface. Preliminary calculations suggest significant heat removal capability by using this technique.Intellectual Merit: This effort is aimed at providing quantitative data in support of the proposed technique. The proposed technique is based on two observations: (i) By using metals/alloys that are liquid at room temperature (instead of e.g. air cooling) heat transfer rate of a cooling system can be enhanced significantly, (ii) Electrocapillary is an efficient, low power consumption, and low voltage actuation technique for pumping liquidsat micro-scales. Feasibility analysis for such a system will be conducted by focusing on two separate aspects of the project. First, modeling of both electrowetting on dielectric (for conductive liquids) and dielectrophoresis (for dielectric liquids) will be conducted tofind droplet velocity and heat transfer rate for a given actuation voltage. In order to validate these models, experiments will be conducted where the heat transfer coefficients and droplet velocities are directly measured for various actuation parameters.Broader Impacts: It is expected that this project will create innovative advances in a new class of thermal management techniques for compact micro systems. Existing disciplinary courses at CU Boulder will be enriched with results from this work, expanding studentmultidisciplinary exposure to thermofluidics, micro fabrication, and numerical simulation. Advances in thermal management of compact micro systems and micro fluidics are anticipated based on the research proposed in this investigation. These will be disseminated widely at national meetings and through journal publications.