Wai Ooi Jen, Gunnasegaran Prem, Hasini Hasril
Institute of Power Engineering, Putrajaya Campus, Universiti Tenaga Nasional, Jalan IKRAM-UNITEN, Kajang 43000, Malaysia.
Department of Mechanical Engineering, College of Engineering, Putrajaya Campus, Universiti Tenaga Nasional, Jalan IKRAM-UNITEN, Kajang 43000, Malaysia.
Micromachines (Basel). 2022 Nov 24;13(12):2059. doi: 10.3390/mi13122059.
Nanofluids offer great potential heat transfer enhancement and provide better thermophysical properties than conventional heat transfer fluids. Application of nanofluids in jet impingement cooling is used for many industrial and scientific purposes as it manages to effectively remove high localized heat. Owing to its tremendous improvement of the heat transfer field, the use of nanofluids in jet impingement cooling has caught the attention of many researchers. This paper reviews previous research and recent advancements of nanofluid jet impingement via both experimental and numerical studies. In experimental approaches, AlO-water nanofluids are the most used working fluids by researchers, and most experiments were conducted with conventional impinging jets. As for the numerical approach, the single-phase model was the preferred model over the two-phase model in obtaining numerical solutions, due to the lower computational time required. A deep insight is provided into nanofluid preparation and methods for stabilization. Parameters affecting the performance of the jet impinging system are also investigated with comparison to numerous publications. The main parameters for jet impinging include the jet-to-plate distance (H/D), the shape of the impinged plate (curved, flat or concave), nozzle configurations and the twisted tape ratio. Studies on conventional impinging jets (CIJs), as well as swirling impinging jets (SIJs), are presented in this paper.
纳米流体具有极大的强化传热潜力，并且与传统传热流体相比具有更好的热物理性质。纳米流体在射流冲击冷却中的应用可用于许多工业和科学目的，因为它能够有效地去除高度局部化的热量。由于其在传热领域的巨大进步，纳米流体在射流冲击冷却中的应用引起了许多研究人员的关注。本文通过实验和数值研究回顾了纳米流体射流冲击的先前研究和最新进展。在实验方法中，氧化铝 - 水纳米流体是研究人员最常用的工作流体，并且大多数实验是使用传统的冲击射流进行的。至于数值方法，由于所需的计算时间较短，在获得数值解时，单相模型比两相模型更受青睐。本文深入探讨了纳米流体的制备和稳定化方法。还与众多出版物进行比较，研究了影响射流冲击系统性能的参数。射流冲击的主要参数包括射流与平板的距离（H / D）、被冲击平板的形状（弯曲、平坦或凹形）、喷嘴配置和扭曲带比。本文介绍了对传统冲击射流（CIJ）以及旋转冲击射流（SIJ）的研究。
