Bubble cavitation in a microchannel

Li, J.; Cheng, Ping

doi:10.1016/j.ijheatmasstransfer.2003.11.020

Cited by 89 publications

(52 citation statements)

References 21 publications

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“…Channel section shape, geometric scale, quality flow and entrance undercooling temperature of cooling medium and surface wettability factors have an important effect on boiling incipience [2], so the initial boiling temperature prediction model should be fully considered above factors.…”

Section: Boiling Incipiencementioning

confidence: 99%

“…It has become a hot topic in the field of high heat flow electronic chip cooling in recent years. But the typical area package is 1mm 2 and thermal power is 1-5w for high power LED chip, the heat flux generated in such a small area up to 100-500w/cm 2 . The PN junction temperature of the LED will jump if the high heat flux does not release timely, and resulting in light emitting efficiency cut down, changing color temperature and color coefficient of LED chip and decreasing stability and life etc.…”

Section: Introductionmentioning

confidence: 99%

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Research Progress of Phase-change Cooling in High-power LED Microchannel

Liu¹,

Zhang²,

Sun³

2018

Proceedings of the 2017 3rd International Forum on Energy, Environment Science and Materials (IFEESM 2017)

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Abstract. In view of high-power LED microchannel phase-change cooling system, scientific problems, such as boiling incipience, flow pattern, heat transfer character, pressure drop and heat transfer instability are summarized. Proposing simultaneous measurement and analysis of phase-change cooling flow pattern, temperature response and synchronous pressure to reveal the mechanism of heat transfer instability, so as to development new method to inhibit heat transfer instability. Thermal siphon principle used for phase-change condensation for microchannel heat transfer is directed against the scientific problems of large consumption of pump power. And establish the optimized matching principle by optimization of property of system working fluid, nano particles, height difference between evaporation entrance and condensation outlet for phase-change condensation heat transfer of high-power LED microchannel.

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Section: Boiling Incipiencementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Research Progress of Phase-change Cooling in High-power LED Microchannel

Liu¹,

Zhang²,

Sun³

2018

Proceedings of the 2017 3rd International Forum on Energy, Environment Science and Materials (IFEESM 2017)

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“…The processes of deformation and fragmentation of the dispersed phase have been considered in [21][22][23][24][25][26][27][28][29][30] but these processes are still not fully understood and require large energy consumptions for their practical realization.…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

“…The main factors responsible for the drop fragmentation in a liquid medium are as follows: relative velocity of the droplet flow, acceleration of the flow, density of the dispersed and continuous phases, surface tension, viscosities of both liquids, and characteristic time of their interaction. The types of hydrodynamic instability that occurs when these factors are affected are as follows [23,24]. 1) Tolmin-Schlichting instability arising as a result of transition from laminar flow to turbulent flow.…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

Formation of the steam phase in superheated liquids in the state of metastable equilibrium

Pavlenko

Koshlak

2017

EEJET

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Представлені результати досліджень процесів пароутворення в рідинах, що знаходяться в стані метастабільної рівноваги. Розглянуто закономір-ності тепломасообміну у термодинамічно нестій-ких рідинах у стані квазістаціонарної термодина-мічної рівноваги (перегріті рідини). Моделюються процеси термодинамічного подрібнення вторин-ної фази рідкої суміші. Запропоновано методику визначення основних термодинамічних параметрів перегрітої рідини і пару. Отримані результати можна застосувати для оцінки енергетичних пара-метрів технології термодинамічної гомогенізації Ключові слова: перегріта рідина, пароутворен-ня, тепломасообмін у метастабільних рідинах, математичне моделювання Представлены результаты исследований про-цессов парообразования в жидкостях, находящих-ся в метастабильном состоянии. Рассмотрены закономерности тепломассообена в термодинами-чески неустойчивых жидкостях в состоянии ква-зистационарного термодинамического равновесия (перегретые жидкости). Моделируются процессы термодинамического дробления вторичной фазы жидкостной смеси. Предложена методика опреде-ления основных термодинамических параметров перегретой жидкости и пара. Полученные резуль-таты можно применить для оценки энергетиче-ских параметров технологии термодинамической гомогенизации Ключевые слова: перегретая жидкость, паро-образование, тепломассообмен в метастабильных жидкостях, математическое моделирование UDC 532.529

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“…Although the effect of contact angle on the boiling incipience are discussed by several researchers (Basu et al, 2002;Qu and Mudawar, 2002;Li and Cheng, 2004), the ONB data in microchannels are usually not accompanied by the information regarding the surface wettability. In the case of microchannels, specific information on the surface properties is considered to be of particular importance to predict the ONB condition since the presence of cavities of a wide spectrum in sizes may not be expected.…”

Section: Experimental Workmentioning

confidence: 99%

Onset of Nucleate Boiling in Mini and Microchannels: A Brief Review

Okawa¹

2012

Frontiers in Heat and Mass Transfer

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The present article summarizes the studies on the thermalhydraulic condition under which the onset of nucleate boiling (ONB) is triggered in subcooled flow boiling. Available correlations and experimental data show that the ONB is tended to be delayed in mini and microchannels. It is known that the ONB condition is significantly dependent on the surface condition even in conventional-sized channels. Accumulation of ONB data accompanied by the information on the surface condition is therefore considered of importance to elucidate the mechanisms of boiling incipience in microchannels. Discussion is also made for the bubble dynamics observed in mini and microchannels. It is indicated that the bubble behavior at ONB in mini and microchannels may significantly be different from that in conventional-sized channels and have greater impact on the system performance. Further studies on the bubble dynamics following nucleation at ONB are also requested to improve the design of heat transfer devices using mini and microchannels.

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Bubble cavitation in a microchannel

Cited by 89 publications

References 21 publications

Research Progress of Phase-change Cooling in High-power LED Microchannel

Research Progress of Phase-change Cooling in High-power LED Microchannel

Formation of the steam phase in superheated liquids in the state of metastable equilibrium

Onset of Nucleate Boiling in Mini and Microchannels: A Brief Review

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