Visualization study of steam condensation in wide rectangular silicon microchannels

Wu, Jiafeng; Shi, Mingheng; Chen, Yongping; Li, Xin

doi:10.1016/j.ijthermalsci.2010.01.007

Cited by 48 publications

(15 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Chen et al conducted several experiments on the condensation of steam in triangular, trapezoidal, and rectangular microchannels, with characteristic dimensions in the range of dozens micrometers. Of particular interest is the observation of injection flow, which has been identified as the eigen pattern of microscale flow condensation.…”

Section: Introductionmentioning

confidence: 99%

Visualization study of flow condensation in hydrophobic microchannels

et al. 2014

Self Cite

View full text Add to dashboard Cite

A visualization study on flow condensation in hydrophobic rectangular silicon microchannels with hydraulic diameter of approximately 150 lm is conducted. Thin Au film with thickness of 200 nm is sputtered on channel surfaces to create a hydrophobic surface with an equilibrium contact angle of approximately 96. In addition to traditional droplet flow, droplet-annular compound flow, droplet-injection compound flow, and droplet-bubble/slug compound flow are also observed. The results indicate that injection location is postponed, and injection frequency increases with increasing inlet vapor Reynolds number and condensate Weber number. An empirical correlation of the injection location and injection frequency are presented and discussed. In particular, for a larger inlet vapor Reynolds number, the injection flow is closer to the channel outlet and the condensation heat transfer is enhanced.

show abstract

Section: Introductionmentioning

confidence: 99%

Visualization study of flow condensation in hydrophobic microchannels

et al. 2014

Self Cite

View full text Add to dashboard Cite

show abstract

“…However, these results are mostly obtained in circular tubes [12,[16][17][18][19], square [13] or low aspect ratio rectangular channels [15,20,21] and trapezoidal channels [22,23]. Only very limited studies utilised channels with high aspect ratio [24], r = 9.668; and [14], r = 40, 20 and 12. Figure 14b exhibits several typical flow regimes encountered in flow boiling within high-aspect-ratio rectangular microchannels.…”

Section: Two-phase Flow Patternsmentioning

confidence: 99%

Two-Phase Flow and Heat Transfer in Micro-Channels and Their Applications in Micro-System Cooling

Wang

Sefiane

Harmand

et al. 2011

Advanced Structured Materials

View full text Add to dashboard Cite

Heat management in high thermal-density systems is confronting rising challenges due to the extremely high heat dissipation capacity requirement in ever more miniaturized and intensified processes. Efforts have been made for heat transfer enhancement. A number of heat transfer technologies including natural convention and radiation, forced convection, pool boiling, micro-channel flow boiling, heat pipes and capillary pumps were introduced. However, the drastically increasing heat transfer requirements are still calling for extensive experimental investigations, especially on the phase change processes in micro-scale. A review of the experimental studies on two-phase flow boiling and heat transfer in small flow passages was presented. Some experimental results published in the year 1993-2010 were overviewed, revealing some controversial conclusions on microscale flow boiling heat transfer mechanisms. Besides, several existing heat transfer correlations were assessed. It should be admitted that the existing database is still limited, especially for flow boiling in passages with unique geometries such as high-aspect-ratio cross section.

show abstract

“…The solid-liquid phase change process has a wide range of applications in industrial fields such as waste heat recovery [1][2][3], thermal energy storage [4,5], heat dissipation in electronic device [6][7][8][9] and building energy conservation [10,11], because of its significant advantages such as high energy density, minor volume change, and simple device structure. However, the thermal conductivity of most known phase change materials (PCM) is relatively low, which makes the heat transfer efficiency of the PCM heat storage process relatively low [5].…”

Section: Introductionmentioning

confidence: 99%

Numerical Study on Melting Heat Transfer in Dendritic Heat Exchangers

Luo

Liao

2018

Energies

View full text Add to dashboard Cite

The dendritic fin was introduced to improve the solid-liquid phase change in heat exchangers. A theoretical model of melting phase change in dendritic heat exchangers was developed and numerically simulated. The solid-liquid phase interface, liquid phase rate and dynamic temperature change in dendritic heat exchanger during melting process are investigated and compared with radial-fin heat exchanger. The results indicate that the dendritic fin is able to enhance the solid-liquid phase change in heat exchanger for latent thermal storage. The presence of dendritic fin leads to the formation of multiple independent PCM zones, so the heat can be quickly diffused from one point to across the surface along the metal fins, thereby making the PCM far away from heat sources melt earlier and faster. In addition, the dendritic structure makes the PCM temperature distribution more uniform over the entire zone inside heat exchangers due to high-efficient heat flow distribution of dendritic fins. As a result, the time required for the complete melting of the PCM in dendritic heat exchanger is shorter than that of the radial-fin heat exchanger.

show abstract

Visualization study of steam condensation in wide rectangular silicon microchannels

Cited by 48 publications

References 27 publications

Visualization study of flow condensation in hydrophobic microchannels

Visualization study of flow condensation in hydrophobic microchannels

Two-Phase Flow and Heat Transfer in Micro-Channels and Their Applications in Micro-System Cooling

Numerical Study on Melting Heat Transfer in Dendritic Heat Exchangers

Contact Info

Product

Resources

About