Zongguo Xue , Yunfei Yan , Ziqiang He , Jinxiang You , Chenghua Zhang
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Performance analysis of trade-off for thermal and hydraulic characteristics for liquid-jet-cooled heat sink
Aiming to enhance the overall cooling characteristic for high heat flux density and high input power operating chips, the jet nozzle diameters and spacing distribution of the jet nozzle were parametrically investigated. The findings demonstrate that the heat dissipation characteristics of the heating surface presented a volcanic change trend and the heat sink with 2 mm jet nozzle diameter creates a visible tradeoff for thermal and hydraulic characteristics. The larger or smaller jet nozzle holes can weaken cooling capacity. Furthermore, the results of the comprehensive evaluation index PPTR also demonstrated that the overall cooling characteristics of the 2 mm jet nozzle holes were optimal. The distribution pattern of jet nozzle holes on the diverter orifice plate plays an important role in balancing between thermal performance and power consumption. The results show that the non-uniform jet holes have been greatly improved comparing the uniform distribution of jet nozzle holes, and the temperature uniform performance was maximum increased up to 54 %, the power consumption was a maximum decrease of about 9.6 %. It was concluded that the change of the spacing distance and diameters for the jet nozzle has an important value for improving the heat dissipation function of heat sinks.
期刊介绍:
The International Journal of Thermal Sciences is a journal devoted to the publication of fundamental studies on the physics of transfer processes in general, with an emphasis on thermal aspects and also applied research on various processes, energy systems and the environment. Articles are published in English and French, and are subject to peer review.
The fundamental subjects considered within the scope of the journal are:
* Heat and relevant mass transfer at all scales (nano, micro and macro) and in all types of material (heterogeneous, composites, biological,...) and fluid flow
* Forced, natural or mixed convection in reactive or non-reactive media
* Single or multi–phase fluid flow with or without phase change
* Near–and far–field radiative heat transfer
* Combined modes of heat transfer in complex systems (for example, plasmas, biological, geological,...)
* Multiscale modelling
The applied research topics include:
* Heat exchangers, heat pipes, cooling processes
* Transport phenomena taking place in industrial processes (chemical, food and agricultural, metallurgical, space and aeronautical, automobile industries)
* Nano–and micro–technology for energy, space, biosystems and devices
* Heat transport analysis in advanced systems
* Impact of energy–related processes on environment, and emerging energy systems
The study of thermophysical properties of materials and fluids, thermal measurement techniques, inverse methods, and the developments of experimental methods are within the scope of the International Journal of Thermal Sciences which also covers the modelling, and numerical methods applied to thermal transfer.