Waves, Instabilities, and Rivulets in High Quality Microgap Two-Phase Flow

Bar‐Cohen, Avram; Holloway, Caleb A.

doi:10.1088/1742-6596/745/2/022002

Cited by 19 publications

(7 citation statements)

References 16 publications

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“…One of the promising ways of removing large heat fluxes from the surface of heatstressed elements of electronic devices is the use of two-phase flows in microchannels [1,2]. The most efficient flow regimes in the channel (in terms of heat removal) is annular or stratified flow [3]. Flow regimes are of interest for study [4][5][6], investigation has been carried out for various channel parameters.…”

Section: Introductionmentioning

confidence: 99%

Two–phase flow of air–water mixture in a minichannel

2019

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Two-phase systems have a huge potential for solving problems of removing large heat fluxes. To date, mini-channel and microchannel systems are widespread. Of particular interest are the stratified flow regime and the annular flow regime in mini-and micro-channel. It is necessary to know in detail the map of flow regimes for the realization of these flow regimes. In this paper, we present an investigation of flow regimes for a rectangular mini-channel 10 mm wide and 1.1 mm high.

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Section: Introductionmentioning

confidence: 99%

Two–phase flow of air–water mixture in a minichannel

2019

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“…Today, in DATA centers, about 30-40% of all energy is used by cooling system. Currently, the global industry is ready to produce high-performance electronic components where the heat flux density at individual sites can reach 1000 W/cm 2 and higher [1]. However, the introduction and use of these devices faces challenges of removing such high specific heat fluxes into the ambient medium.…”

Section: Introductionmentioning

confidence: 99%

“…One of the promising ways of removing large heat fluxes from the surface of heatstressed elements of electronic devices is the use of two-phase flows in microchannels [2,3]. The most efficient flow regimes in the channel (in terms of heat removal) are annular or stratified flow [1]. Authors of [4][5][6] suggested to use artificially formed stratified flow in the channel, namely a thin liquid film, moving under the action of the gas flow in the channel.…”

Section: Introductionmentioning

confidence: 99%

Two-phase cooling system with controlled pulsations

2019

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One of the promising ways of removing large heat fluxes from the surface of heat-stressed elements of electronic devices is the use of evaporating thin layer of liquid film, moving under the action of the gas flow in a flat channel. In this work, a prototype of evaporative cooling system for high heat flux removal with forced circulation of liquid and gas coolants with controlled pulsation, capable to remove heat flux of up to 1,5 kW/cm 2 and higher was presented. For the first time the regime with controlled pulsation is used. Due to pulsations, it is possible to achieve high values of critical heat flux due to a brief increase in the flow rate of the liquid, which allows to "wash off" large dry spots and prevent the occurrence of zones of flow and drying.

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“…Development of the modern microelectronic equipment requires the effective cooling solutions because it is necessary to remove high heat fluxes of up to 1 kW/cm 2 and higher from the local hot spots of the processor [1]. Thin and ultra-thin (less than 10 µm in thickness) liquid films, moving under the action of a forced gas flow in a mini-channel, are promising for the use in the temperature control systems of modern semiconductor devices [2].…”

Section: Introductionmentioning

confidence: 99%

An experimental study of high heat flux removal by shear-driven liquid films

2017

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Abstract.Intensively evaporating liquid films, moving under the friction of a co-current gas flow in a mini-channel (shear-driven liquid films), are promising for the use in cooling systems of modern semiconductor devices with high local heat release. In this work, the effect of various parameters, such as the liquid and gas flow rates and channel height, on the critical heat flux in the locally heated shear-driven water film has been studied. A record value of the critical heat flux of 1200 W/cm 2 has been achieved in experiments. Heat leaks to the substrate and heat losses to the atmosphere in total do not exceed 25% for the heat flux above 400 W/cm 2 . Comparison of the critical heat fluxes for the shear-driven liquid film and for flow boiling in a minichannel shows that the critical heat flux is an order of magnitude higher for the shear-driven liquid film. This confirms the prospect of using shear-driven liquid films in the modern high-efficient cooling systems.

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Waves, Instabilities, and Rivulets in High Quality Microgap Two-Phase Flow

Cited by 19 publications

References 16 publications

Two–phase flow of air–water mixture in a minichannel

Two–phase flow of air–water mixture in a minichannel

Two-phase cooling system with controlled pulsations

An experimental study of high heat flux removal by shear-driven liquid films

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