Critical heat flux in locally heated liquid film moving under the action of gas flow in a mini-channel

Tkachenko, Egor; Зайцев, Д. В.; Orlik, Evgeniy; Kabov, Oleg

doi:10.1088/1742-6596/754/3/032019

Cited by 9 publications

(3 citation statements)

References 11 publications

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“…Recent experimental investigations conducted in works [5,6] proved possible removal of heat fluxes with density of up to 870 W/cm 2 from the heating area of 1x1 cm 2 using this method. The works [7,8] showed that such a system can operate stably in a wide range of the channel heights (0.17-2.00 mm) and angles of the channel inclination to the horizon (0-360°).…”

Section: Introductionmentioning

confidence: 96%

An experimental model of evaporative cooling system with forced circulation of coolant for high-performance electronic components

et al. 2017

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Abstract.A promising way to remove heat fluxes from the surfaces of electronic devices with high heat generation is the use of evaporating thin liquid film, moving under the action of gas flow in a channel. On the basis of the studies conducted previously, we have developed a pilot model of the experimentalindustrial prototype for removing heat fluxes with densities of up to 1000 W/cm 2 from the surface of the heat-stressed element with dimensions 10x10 mm 2 . Testing of the model has proved its efficiency in continuous operation.

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Section: Introductionmentioning

confidence: 96%

An experimental model of evaporative cooling system with forced circulation of coolant for high-performance electronic components

et al. 2017

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“…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. Recent experimental investigations conducted in works [7][8][9] proved possible removal of heat fluxes with density of up to 1200 W/cm 2 from the heating area of 10x10 mm 2 using this method. The works [10,11] showed that such a system can operate stably in a wide range of the channel heights (0.17-2.00 mm) and angles of the channel inclination to the horizon (0-360°).…”

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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“…The method turned out to be an order of magnitude more efficient, in comparison with the falling liquid film [6][7][8]. In [9][10][11], studies were carried out that showed the possibility of removing heat fluxes of density up to 1200 W/cm 2 from the heating area 1x1 cm 2 by means of a thin film moving under the action of the gas flow in the channel. In [12,13] it was shown that such a system can work steadily in a wide range of channel height changes (0.17-2.00 mm) and channel inclination angles to the horizon (0-360°).…”

Section: Introductionmentioning

confidence: 99%

Dynamics of dry spots in the liquid film moved by the gas flow in the mini-channel under intensive local heating

Tkachenko

2018

MATEC Web Conf.

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Experimental studies of hydrodynamics and the heat transfer crisis were carried out for a two-phase stratified flow in a mini-channel with intensive heating from a heat source of 1x1 cm2. It has been established that as the heat flow increases, the total area of dry spots on the heater increases, but when a certain temperature of the heater surface reaches ≈100 °C, the area of dry spots begins to decrease. With the help of high-speed visualization (shooting speed 100000 frames per second), several stages of formation of a dry spot (a typical size of the order of 100 microns) were isolated. It was found that at a heat flux of 450 W/cm2 about 1 million dry spots per 1 second are formed and washed on the surface of the heater (1 cm2). The speed of the contact line when dry spot is forming reaches 10 m/s.

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Critical heat flux in locally heated liquid film moving under the action of gas flow in a mini-channel

Cited by 9 publications

References 11 publications

An experimental model of evaporative cooling system with forced circulation of coolant for high-performance electronic components

An experimental model of evaporative cooling system with forced circulation of coolant for high-performance electronic components

Two-phase cooling system with controlled pulsations

Dynamics of dry spots in the liquid film moved by the gas flow in the mini-channel under intensive local heating

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