SGER: Experimental Investigation of Transport Phenomena in Buoyancy Driven Nanofluids

对浮力驱动纳米流体（BDNF）体系中的输运现象进行了初步的实验研究。纳米流体是通过将纳米颗粒悬浮在常规传热流体中而设计的新型传热流体。纳米颗粒的存在改变了传统流体的传输特性，从而增加了纳米流体的有效导热率。浮力驱动的纳米流体系统在MEMS和电子热管理以及发动机冷却系统、超导磁体和其他冷却应用中具有潜在的应用。本研究的目的是开发经验的相关性，用于预测包含BDNF的外壳中的热传递，并为长期的研究工作奠定基础，以了解BDNF的热传输的基本原理。这个初步调查的结果将作为基础的参数实验研究的影响，如体积分数，流体和纳米颗粒的热物理性质，纵横比，体积膨胀系数，和速度的纳米流体的浮力驱动的纳米流体的传热增强。该信息在确定浮力驱动的纳米流体的热性能以及设计用于冷却电子设备和其他工程系统的纳米流体传热系统方面具有实际意义。

A preliminary experimental investigation is proposed to study the transport phenomena in Buoyancy-Driven Nanofluid (BDNF) system. Nanofluids are a new class of heat transfer fluid engineered by suspending nanoparticles in the conventional heat transfer fluid. The presence of the nanoparticles changes the transport properties of the conventional fluid thereby increasing the effective thermal conductivity of nanofluid. Buoyancy-driven nanofluid systems have potential applications in the MEMS and electronics thermal management, as well as in engine cooling systems, superconducting magnets, and other cooling applications. The objectives of this study are to develop empirical correlations for predicting the heat transfer in enclosures that contain BDNF and to lay the foundations for a longer term research effort to understand the fundamentals of thermal transport in BDNF. The outcome of this preliminary investigation will serve as groundwork for parametric experimental studies on the influence of parameters such as volume fraction, thermophysical properties of the fluid and nanoparticles, aspect ratio, volumetric expansion coefficient, and velocity of the nanofluids on heat transfer enhancement of buoyancy-driven nanofluids. This information is of practical relevance in determining the thermal performance of buoyancy-driven nanofluids, and designing nanofluid heat transfer systems for cooling of electronics and other engineering systems.