Flow pattern based correlations of two-phase pressure drop in rectangular microchannels

Choi, Chiwoong; Kim, Moo-Hwan

doi:10.1016/j.ijheatfluidflow.2011.08.002

Cited by 47 publications

(11 citation statements)

References 26 publications

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“…Moreover, it is clearly seen in both channels that vapour quality is indirectly proportional with the mass flux. Choi and Kim [79] carried out experiments on rectangular ducts with varying dimensions and hydraulic diameters (141,143,304, 322 and 490 µm). Several homogenous and separated flow correlations were discussed and a new one was proposed.…”

Section: Microchannel Geometrymentioning

confidence: 99%

A Review of Flow Boiling in Mini and Microchannel for Enhanced Geometries

Dalkılıç¹

2018

Journal of Thermal Engineering

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Flow boiling researches in enhanced geometries practiced recently have been summarized in this review. Classical approximations in macroscale flows have not applied to the flows with small hydraulic diameters, so, this subject has been paid attention by the researchers. Application areas of these structures are increasing continuously due to cooling need in small confined spaces. The related studies have been reviewed in a chronological manner and their parameters have been given in a table in order for the researchers to observe the scientific duration regarding the progresses on this subject. Almost all papers on this subject have been produced after 2000, therefore, this subject is considered as an actual one to improve and worth to study in the literature. This study can not only be evaluated as the beginning argument for the researchers involved in flow boiling process in mini and microchannel, but it also consists of new works on the investigated subject.

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Section: Microchannel Geometrymentioning

confidence: 99%

A Review of Flow Boiling in Mini and Microchannel for Enhanced Geometries

Dalkılıç¹

2018

Journal of Thermal Engineering

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“…In addition to this convection during boiling requires less pumping capacity & less flow rate to blow away equal heat in comparison to single-phase. The cooling fluid when flows through a MCHS follows different flow patterns, such as a bubble flow [5][6][7][8][9][10][11][12], a flow of mucus [5][6][7][10][11][12][13][14], a ring flow, an outflow flow [10][11], a plug flow [12][13], wavy flow [15], stratified flow [15], etc. as demonstrated in Fig.1 that affected the heat transfer of MCHS.…”

Section: Introductionmentioning

confidence: 99%

Impact of Channel Geometries and Flow Patterns On Micro-Channel Heat Sink Performance

Chandra¹,

Prakash²

2019

IJITEE

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Demand for greater capability of electronic devices in very small volume for compactness has affected huge augmentations in heat indulgence at all stages of device, electronic wrapping, test section and system. Latest cooling systems are hence needed to eliminate the released heat while maintaining compactness of the device. The micro-channel heat sink (MCHS) is ideal for this situation as it consists of channels of micron size which offers an extended surface area to volume ratio of approximately 15.294 m2 / m3 compared to 650 m2 / m3 for a typical heat compact exchanger. A comprehensive review has been done for consequence of heat flux (qo ), mass flux (G), vapour quality (x) and channel geometries at flow patterns and heat dissipation of MCHS. The study show that to increase the rate of heat transfer by using different channel geometries like converging-diverging, segmented etc. compared to conventional rectangular micro-channels has given better cooling effect The Flow patterns like bubbly, slug flow are associated with nucleate boiling dominated in low vapour quality and annular flow also given the significant effect on heat transfer in higher vapour quality region

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“…Choi and Kim [36] used water and nitrogen gas in a single microchannel for their adiabatic two-phase pressure drop study. They investigated the homogeneous model with seven different viscosity averaging schemes and the separated flow model with ten different correlations.…”

Section: Introductionmentioning

confidence: 99%