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Hydrothermal and entropy generation specifications of a hybrid ferronanofluid in microchannel heat sink embedded in CPUs

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Chinese Journal of Chemical Engineering 2021年第4期34卷 27-38页

作者： amin shahsavar Majid Jafari Pouyan Talebizadehsardari Davood Toghraie Department of Mechanical Engineering Kermanshah University of TechnologyKermanshahIran Metamaterials for Mechanical Biomechanical and Multiphysical Applications Research GroupTon Duc Thang UniversityHo Chi Minh CityVietnam Faculty of Applied Sciences Ton Duc Thang UniversityHo Chi Minh CityVietnam Department of Mechanical Engineering Khomeinishahr BranchIslamic Azad UniversityKhomeinishahrIran

The objective of this numerical work is to evaluate the first law and second law performances of a hybrid nanofluid flowing through a liquidcooled microchannel *** waterbased hybrid nanofluid includes the Fe_(3)O_(4)and carbon nanotubes(CNTs)*** heatsink includes a microchannel configuration for the flow field to gain heat from a processor placed on the bottom of the *** effects of Fe_(3)O_(4)concentration(φFe_(3)O_(4))>CNT concentration(φCNT)and Reynolds number(Re)on the convective heat transfer coefficient,CPU surface temperature,thermal resistance,pumping power,as well as the rate of entropy generation due to the heat transfer and fluid friction is *** results indicated higher values of convective heat transfer coefficient,pumping power,and frictional entropy generation rate for higher values of Re,Fe_(3)O_(4)andφ*** increasing Re,Fe_(3)O_(4)and uCNT,the CPU surface temperature and the thermal resistance decrease,and the temperature distribution at the CPU surface became more *** achieve the maximum performance of the studied heatsink,applying the hybrid nanofluid with low Fe_(3)O_(4)andφCNT was suggested,while the minimum entropy generation was achieved with the application of nanofluid with highφFe_(3)O_(4)andφCNT.

关键词： Liquid-cooled heatsink Hydrothermal aspects Irreversibility Hybrid nanofluid Carbon nanotube Fe_(3)O_(4)

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Effects of the porous medium and water-silver biological nanofluid on the performance of a newly designed heat sink by using first and second laws of thermodynamics

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Chinese Journal of Chemical Engineering 2020年第11期28卷 2928-2937页

作者： amin shahsavar Sajad Entezari Davood Toghraie Pouya Barnoon Department of Mechanical Engineering Kermanshah University of TechnologyKermanshahIran Department of Mechanical Engineering Khomeinishahr BranchIslamic Azad UniversityKhomeinishahrIran

The aim of this numerical investigation is to evaluate the laminar forced convection of biologically synthesized water-silver nanofluid through a heat sink(HS)filled with porous foam(PHS)using first and second laws of *** impacts of inlet velocity(V=0.5–3 m·s^-1)and volume fraction of nanofluid(φ=0–1%)on the performance metrics of HS are assessed and the outcomes are compared with those of the non-porous HS(NHS).The outcomes revealed that for both the PHS and NHS,the increase of V causes an intensification in convection coefficient,pumping power,and entropy generation due to fluid friction,while the maximum CPU temperature,thermal resistance,and entropy generation due to the heat transfer reduces by boosting ***,it was found that the augmentation of V results in intensification in convection coefficient,pumping power,overall hydrothermal performance,and frictional entropy generation,while the opposite is true for maximum CPU temperature,thermal resistance,and thermal entropy ***,it was reported that,except forφ=0.5%,the overall hydrothermal performance of NHS is better than that of PHS,while PHS has better second-law performance than NHS in all the studied ***,it can be concluded that the best hydrothermal performance for PHS belongs toφ=1%and V=0.5 m·s^-1,while for NHS,these values are 1%and 2 m·s^-1.

关键词： Porous medium Heat sink First and second laws of thermodynamics Biologically prepared water-silver nanofluid

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多层多孔金属泡沫填充的水基散热器冷却CPU:基于热液和熵产分析角度

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Journal of Central South University 2023年第11期30卷 3641-3655页

作者： amin shahsavar Mohammad SHAHMOHAMMADI Majid SIAVASHI Department of Mechanical Engineering Kermanshah University of TechnologyKermanshah ***Iran Applied Multi-phase Fluid Dynamics Laboratory School of Mechanical EngineeringIran University of Science and TechnologyTehran ***Iran

本研究利用多层多孔金属泡沫从热液和熵产分析角度来改善散热器的性能,并采用计算流体力学方法进行数值模拟,将结果与单层金属泡沫和无金属泡沫情况进行了比较。对于多层泡沫,考虑了两种模式:层间渗透率随着CPU距离的增加而逐渐增加或... 详细信息

本研究利用多层多孔金属泡沫从热液和熵产分析角度来改善散热器的性能,并采用计算流体力学方法进行数值模拟,将结果与单层金属泡沫和无金属泡沫情况进行了比较。对于多层泡沫,考虑了两种模式:层间渗透率随着CPU距离的增加而逐渐增加或减少。结果表明,当泡沫层渗透率随着CPU距离的增加而逐渐减少时,散热器的温度分布均匀性最好,热阻最低,对流系数最高,热液综合性能最好;当泡沫层渗透率随着CPU距离的增加而逐渐增加时,多层泡沫的摩擦熵最低,热熵最高,总熵产率最低。与不含金属泡沫的散热器相比,摩擦熵、热熵和总熵产率分别降低了64.51%~73.02%、42.80%~220.34%和19.68%~62.36%。

关键词：散热片熵产分析 CPU冷却传热多层多孔泡沫热阻

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Effects of the porous medium and water-silver biological nanofluid on the performance of a newly designed heat sink by usingfirst and second laws of thermodynamics

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中国化学工程学报（英文版） 2020年第11期

作者： amin shahsavar Sajad Entezari Davood Toghraie Pouya Barnoon

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