Thermal performance analysis of porous-microchannel heat sinks with different configuration designs

Hung, Tu-Chieh; Huang, Yuxian; Yan, Wei‐Mon

doi:10.1016/j.ijheatmasstransfer.2013.07.019

Cited by 143 publications

(41 citation statements)

References 28 publications

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“…The porous configuration designs in the MCHSs include the rectangular, outlet enlargement, trapezoidal, thin rectangular, block, and sandwich distribution designs (Fig. 2) 2 , respectively. The length of the channel in the streamwise direction is L x .…”

Section: Discussionmentioning

confidence: 99%

“…With the above assumptions, the governing equations of the porous media can be described as follows [2], [9]: …”

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…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.…”

mentioning

confidence: 99%

“…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].…”

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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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Section: Discussionmentioning

confidence: 99%

“…With the above assumptions, the governing equations of the porous media can be described as follows [2], [9]: …”

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

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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Thermo‐hydraulic analysis of wavy microchannel heat sinks with porous fins based on field synergy principle

Dai,

Wang,

Liu

2024

Can J Chem Eng

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In order to enlarge the area and intensity of convective heat transfer among the coolant and heated surface, the vertical fins of microchannel heat sinks (MCHSs) with microencapsulated phase change material slurry (MPCMS) as coolant are arranged into wavy porous channels to realize more heat being dissipated to the outside. The phase transition of microencapsulated particles in laminar flow state is described, and the Brinkman–Forchheimer–Darcy model based on volume average approach and the energy equation for local heat equilibrium are adopted to portray flow and heat transfer in porous medium. The impacts of geometrical parameters on flow and heat transfer behaviour of wavy porous MCHS are numerically analyzed, and performance evaluation factor (PEF) is defined to estimate the thermo‐hydraulic capability of heat exchanger. The numeric outcomes match well with the experiments. Results indicate that MPCMS has a significant heat transfer improvement in the newly designed channel configuration compared with the coolant fluid flowing in the straight microchannel. Based on field synergy principle, the comprehensive capability enhancement mechanism of MPCMS in new MCHS is explored, and its superior thermal performance can be attributed to the improvement of the synergistic degree among flow and temperature fields, and its reasonable structural design can effectively improve the heat rejection capacity in the limited space.

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Falling Film in a Heated Micro-channel

Mejri¹,

Fudym²,

Sghaier³

et al. 2015

Applied Condition Monitoring

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Abstract. The main objective of this work is to study experimentally and numerically a falling film in a micro-channel. The experimental section involves in creating a temperature gradient within the liquid, while monitoring the temperature using an infrared camera. A numerical model is established and solved by a semianalytical method called the thermal quadrupole method. Finally, we conclude with a comparison between the experiments and the numerical study.

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Thermal performance analysis of porous-microchannel heat sinks with different configuration designs

Cited by 143 publications

References 28 publications

Design of Porous-Microchannel Heat Sinks with Different Porous Configurations

Design of Porous-Microchannel Heat Sinks with Different Porous Configurations

Thermo‐hydraulic analysis of wavy microchannel heat sinks with porous fins based on field synergy principle

Falling Film in a Heated Micro-channel

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