An experimental study on thermal performance of Al2O3/water nanofluid in a minichannel heat sink

Ho, Ching-Jenq; Chen, W. C.

doi:10.1016/j.applthermaleng.2012.07.037

Cited by 201 publications

(67 citation statements)

References 17 publications

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“…Making the tradeoff between accuracy and execution time, the grid system 5010145 is finally chosen for the simulation model. It is also found that the present predictions agree well with those of Tuckerman and Pease [21] and Ho et al [22]. Through these tests, the numerical scheme was found to be suitable for the present problem.…”

supporting

confidence: 84%

“…The results confirm that the thermal performance can be enhanced by designing a trapezoidal or sandwich distribution under lower velocity of coolant or selecting a rectangular distribution design under higher one. Such enhancement in the averaged Nusselt number can be further quantified by the corresponding average heat transfer effectiveness h  , which can be defined as [22] designs and the channel without porous medium, respectively. The heat transfer effectiveness is enhanced as the value of h  is larger than unity and the larger the value is the larger the heat transfer effectiveness will be.…”

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

“…It can be further demonstrated by the efficacy of using various porous distribution designs in its effectiveness of minimizing the wall temperature, which is of particular interest in temperature control. The temperature control effectiveness can be defined as [22] bf in wThe suppression of the maximum wall temperature (or temperature control effectiveness) of the heat sink is better as the value of w T  is larger than 0 and the larger the value is the larger the temperature suppressed will be. Fig.…”

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confidence: 99%

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Design of Porous-Microchannel Heat Sinks with Different Porous Configurations

Hung¹,

Huang²,

Yan³

2015

IJMMM

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Abstract-The models of the porous-microchannel heat sinks (porous-MCHSs) with different porous configurations are established in this work. Thermal performances of the porousMCHSs are investigated with the Reynolds number ranging from 45 to 1350. The results indicate that, compared with the results of non-porous MCHS, the thermal performances can be enhanced by using the porous configurations and increase with an increase in the Reynolds number, except for the case with a lower Reynolds number. Both the sandwich and the trapezoidal distribution designs have the best heat transfer efficacy, cooling performance and convective performance. In particular, the thermal performance for rectangular, outlet enlargement, thin rectangular, or block distribution design is not necessarily better than that without porous medium under lower pumping power. Finally, the sandwich distribution design is the best design of the porous-MCHSs by considering the thermal performance along with the pressure drop. Index Terms-Porous-microchannel, heat sink (porous-MCHS). I. INTRODUCTIONThe 3-D numerical model to investigate the effects of the porous configuration designs on the thermal performance of the porous-microchannel heat sinks (porous-MCHSs, as shown in Fig. 1) were proposed in this paper. The porousmicrochannel heat sinks make use of the insertion of a porous metallic medium into the microchannel to raise both the surface contact area-to-volume ratio with the coolant and the local velocity mixing of the coolant. Higher contact surface area-to-volume ratio and velocity mixing of the fluid provide a better convective heat transfer effect [1], [2]. It is known [3]-[10] that the heat transfer performance of porousMCHSs can be improved if the configurations of porosity are properly designed. The heat transfer improvement makes the porous-MCHSs possible of implementing a task of micro-scale electronics cooling [1], [2], [10].Many efforts have been devoted to improve the cooling performance of porous channels [1]- [10]. A sintered porous heat sink for the cooling of high-powered compact microprocessors was examined experimentally by Singh et al. [1]. The forced convection in porous rectangular ducts was performed by Calmidi and Mahajan [3] and Haji-Sheikh Manuscript received April 14, 2015; revised July 20, 2015. This work was supported in part by the National Science Council, R. O. C.Tu-Chieh Hung is with the Department of Mechanical Engineering, R.O.C Military Academy, Kaohsiung 83059, Taiwan (e-mail: christ.rich@msa.hinet.net).Yu-Xian Huang is with Delta Electronics, Tainan County 74144, Taiwan (e-mail: frank-303@yahoo.com.tw).Wei-Mon Yan is with the Department of Energy and Refrigerating AirConditioning Engineering, National Taipei Universi, Taiwan. et al. [4]. Zehforoosh and Hossainpour [5] investigated numerically the laminar forced convection in a partially porous channel using four dissimilar porous blocks attached to strip heat sources at the bottom wall. The fluid flow and heat transfer characteristics of a porous heat sink...

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supporting

confidence: 84%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

mentioning

confidence: 99%

See 2 more Smart Citations

Design of Porous-Microchannel Heat Sinks with Different Porous Configurations

Hung¹,

Huang²,

Yan³

2015

IJMMM

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“…Result also shows when volume fraction of nanoparticle increases under the extreme heat flux, both heat transfer coefficient & wall shear stress increase but thermal resistance of MCHS decrease. Guan Qiu Li et al (2012) [8] [10] They did experiment studied in copper mini channel heat sink using Al2O3-water Nano fluid and determine forced convective heat transfer. They take Reynolds number ranging from 133 to 1515 & they compare the result with the pure water & on the basis of inlet & bulk temperature difference they calculate average heat transfer coefficient & after the experiment they found the Nano fluid cooled heat sink gives higher average heat transfer coefficient as compare to pure water.…”

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confidence: 99%

Numerical Investigation of Nano Fluids Influence on Thermo-Hydraulic Performances of MCPFHS

2017

IJRTER

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Abstract:Numerical study were applied on the influence of Nano fluids (Di-water, CuO-water, Agwater and TiO2-water) as a fluid at volumetric concentration has used (c= 4%) in micro circular pin fin heat sink has studied with the assistance of simulations developed victimization commercially accessible procedure fluid dynamics software Fluent fourteen. The comparison of liquid flow and heat transfer characteristics of cooling fluids has been created beneath the similar stipulation and also the range of Reynolds number has used (100-500). The obtained results is illustrated that, CuO-water Nano fluid is offers the minimum pressure drop and most heat transfer rate compared to Ag-water and TiO2-water Nano fluids. And Di-water Nano fluid is offers most heat transfer rate compared to others. it's additionally supported that Di-water & TiO2-water Nano fluids offer approximate same performance on pressure drop.

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Exergetic performance assessment of magnesium oxide–water nanofluid in corrugated minichannel heat sinks: An experimental study

Sajid

Ali

Biçer

2020

Intl J of Energy Research

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To keep the temperature of miniature devices in the safe threshold, cooling of minichannel heat sinks via nanofluid has emerged as an effective technique.The prime focus of present work is to analyze the impact of channel configuration, nanoparticle concentration, Reynolds number, and heating power on the thermal and exergetic performances of the corrugated minichannel heat sinks by employing distilled water and MgO-water nanofluid as coolants. The heat

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An experimental study on thermal performance of Al2O3/water nanofluid in a minichannel heat sink

Cited by 201 publications

References 17 publications

Design of Porous-Microchannel Heat Sinks with Different Porous Configurations

Design of Porous-Microchannel Heat Sinks with Different Porous Configurations

Numerical Investigation of Nano Fluids Influence on Thermo-Hydraulic Performances of MCPFHS

Exergetic performance assessment of magnesium oxide–water nanofluid in corrugated minichannel heat sinks: An experimental study

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