Numerical model of a two-phase microchannel heat sink electronics cooling system

Saenen, Tom; Baelmans, Martine

doi:10.1016/j.ijthermalsci.2012.04.018

Cited by 22 publications

(12 citation statements)

References 25 publications

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“…Equations (25), (26) represent the entropy generation rate due to heat transfer and to frictional losses respectively; they can be related by introducing the augmentation irreversibility ratio,…”

Section: Entropy Balance and Entropy Generation Numbermentioning

confidence: 99%

Electro-osmotic flow in rectangular microchannels: geometry optimization

Lorenzini

2017

J. Phys.: Conf. Ser.

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Abstract. Micro-flow devices have turned over the years from the subject of fundamental research to fully-fledged industrial applications. Although for some cases the transport phenomena in micro-devices can be handled satisfactorily by using the same approach as for their larger-size counterparts, micro-effects such as electro-osmotic flow (EOF) are typical of small scales and can be employed to circulate coolant through heat sinks by means of electro-osmotic pumping. In order to obey the constraints that different engineering applications impose, design criteria must be employed to optimize the performance of the devices according to the criteria chosen. In this work optimization of the cross-sectional area of a microchannel where EOF and heat transfer at the walls occur is employed to demonstrate how approaches based on the first or second law of thermodynamics may yield opposite results, which are strongly dependent on the peculiarities of EOF, i.e. the ratio of Joule heating to heat transfer at the walls.

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Section: Entropy Balance and Entropy Generation Numbermentioning

confidence: 99%

Electro-osmotic flow in rectangular microchannels: geometry optimization

Lorenzini

2017

J. Phys.: Conf. Ser.

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“…) and numerical (e.g., Refs. ) researches have been carried out regarding microchannel cooling, reviewed by Tullius and colleagues …”

Section: Introductionmentioning

confidence: 99%

“…[13][14][15][16] and numerical (e.g., Refs. [17][18][19][20] researches have been carried out regarding microchannel cooling, reviewed by Tullius and colleagues. 3 For ventilation and refrigeration systems, flow cavitation is a phenomenon that leads to noise, wear and loss of system efficiency and therefore should be avoided.…”

Section: Introductionmentioning

confidence: 99%

Reduction of cavitation in refrigerant fluid flow through micro passages in the presence of external transverse magnetic fields

Aminfar

Mohammadpourfard

Madayen

2017

Heat Trans. Asian Res.

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This paper presents a numerical study of cryogenic fluid flow cavitation in a microchannel and annulus, with forward‐facing step. Two‐phase mixture model is used to simulate the effects of magnetic fields produced by an electrical wire and magnetic doublet on the cavitation region. The results show that considerable reduction of vapor generation due to pressure drop is possible in the presence of an external magnetic fields. This phenomenon occurs due to effect of magnetic field on the pressure distribution in the contraction region and it is observed in both types of studied magnetic fields.

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“…Therefore, several more novel and efficient alternatives have been proposed recently (Schmidt 2003;Kandlikar and Grande 2004a;Saenen and Baelmans 2012;Bermejo et al 2013;Sharma et al 2013;Gong et al 2014). The some of these are: Saenen and Baelmans (2012) presented a numerical model of a two-phase cooling system using microchannel heat sinks. Bermejo et al (2013) investigated 20 electronic components in series which need to dissipate a heat flux of 20 kW/m 2 owing to micro evaporators mounted in a refrigeration system.…”

Section: Introductionmentioning

confidence: 99%

Numerical Investigation of Effects of Ramification Length and Angle on Pressure Drop and Heat Transfer in a Ramified Microchannel

Kaya¹

2016

JAFM

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The aim of this study is to investigate the effects of ramification length and angle on pressure drop and heat transfer in a ramified microchannel. The governing equations for the fluid flow were solved by using Fluent CFD code. Computational results were compared with mathematical model values given in the literature for validation. On the basis of a water-cooled (only water and water+ethanol) smooth microchannel, ramified plates were designed into the heat sink, and then the corresponding laminar flow and heat transfer were investigated numerically. Four different configurations of ramified plates were considered by adjusting the angle and length of the T profile. Results obtained from the numerical tests show good agreement with the mathematical model and these results also demonstrate that the pressure drop increases with increasing both the ramification length and angle. Moreover, the maximum temperature inside the ramified microchannel increases with increasing the ramification length as well as increasing the ratio volume fraction of ethanol.

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Numerical model of a two-phase microchannel heat sink electronics cooling system

Cited by 22 publications

References 25 publications

Electro-osmotic flow in rectangular microchannels: geometry optimization

Electro-osmotic flow in rectangular microchannels: geometry optimization

Reduction of cavitation in refrigerant fluid flow through micro passages in the presence of external transverse magnetic fields

Numerical Investigation of Effects of Ramification Length and Angle on Pressure Drop and Heat Transfer in a Ramified Microchannel

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