Enhanced boiling heat transfer on composite porous surface

Xu, Pengfei; Li, Qiang; Xuan, Yi

doi:10.1016/j.ijheatmasstransfer.2014.08.048

Cited by 117 publications

(34 citation statements)

References 22 publications

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“…The reentrant channels also provide sufficient liquid supply to sustain the cycles of bubble nucleation, growth and expulsions. The latent energy induced by the large wall [11,22,25,41], in which the heat transfer curves declined quickly after reaching the peak, and rapidly approached the critical heat fluxes (CHF).…”

Section: Pool Boiling Heat Transfer Characteristicsmentioning

confidence: 99%

“…It induced severe agitations of the adjacent liquid in the pool. This induced a disturbance of the boundary layer near the heating surface, and increased the microconvection heat transfer[22,41]. Besides, the reentrant channels in the solid sample also provided horizontal liquid replenishment, and the nucleation boiling can be sufficiently sustained due to the horizontal liquid influx from the reentrant channels.…”

mentioning

confidence: 99%

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Comparative experimental study on pool boiling performance of porous coating and solid structures with reentrant channels

Deng

Wan

Feng

et al. 2016

Applied Thermal Engineering

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Section: Pool Boiling Heat Transfer Characteristicsmentioning

confidence: 99%

mentioning

confidence: 99%

Comparative experimental study on pool boiling performance of porous coating and solid structures with reentrant channels

Deng

Wan

Feng

et al. 2016

Applied Thermal Engineering

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“…6) with maximum feature sizes of about 100 lm. 2 With the use of highly conductive copper and aluminum surfaces, functionalization is typically achieved with chemical etching processes or deposition techniques which result in maximum feature sizes of only a few microns, [9][10][11][12][13][14][15][16][17][18] and a moderate increase in critical heat flux and heat transfer coefficient. However, limited research on surface functionalization has been conducted on lower thermal conductivity metallic materials.…”

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confidence: 99%

Secondary pool boiling effects

Kruse

Tsubaki

Zuhlke

et al. 2016

Applied Physics Letters

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A pool boiling phenomenon referred to as secondary boiling effects is discussed. Based on the experimental trends, a mechanism is proposed that identifies the parameters that lead to this phenomenon. Secondary boiling effects refer to a distinct decrease in the wall superheat temperature near the critical heat flux due to a significant increase in the heat transfer coefficient. Recent pool boiling heat transfer experiments using femtosecond laser processed Inconel, stainless steel, and copper multiscale surfaces consistently displayed secondary boiling effects, which were found to be a result of both temperature drop along the microstructures and nucleation characteristic length scales. The temperature drop is a function of microstructure height and thermal conductivity. An increased microstructure height and a decreased thermal conductivity result in a significant temperature drop along the microstructures. This temperature drop becomes more pronounced at higher heat fluxes and along with the right nucleation characteristic length scales results in a change of the boiling dynamics. Nucleation spreads from the bottom of the microstructure valleys to the top of the microstructures, resulting in a decreased surface superheat with an increasing heat flux. This decrease in the wall superheat at higher heat fluxes is reflected by a “hook back” of the traditional boiling curve and is thus referred to as secondary boiling effects. In addition, a boiling hysteresis during increasing and decreasing heat flux develops due to the secondary boiling effects. This hysteresis further validates the existence of secondary boiling effects.

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“…Effect of pore structure is also key factor to study performance of porous metal fiber materials [9]. Porous surface is also introduced to investigate pool boiling heat transfer, [10]. Apart from the porous solid material many of researches has been done using porous foam also to enhance the heat transfer and apply this foam for boiling and condensation processes.…”

Section: IImentioning

confidence: 99%

Investigation of Heat Transfer Rate through Porous Material

Vanjari¹

2017

IJRASET

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The present experimental work is done to investigate forced convective heat transfer rate through porous material. For this study stainless steel ball of diameter 8, 12 and 16 mm are used to form test section with different porosity. The different parameters are calculated like Reynolds number, Prandtl number, porosity, convective heat transfer coefficient and plotted the effects of porosity and mass flow rate on heat transfer rate. It shows that for minimum porosity heat transfer rate increases and it depends upon mass flow rate also.

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Enhanced boiling heat transfer on composite porous surface

Cited by 117 publications

References 22 publications

Comparative experimental study on pool boiling performance of porous coating and solid structures with reentrant channels

Comparative experimental study on pool boiling performance of porous coating and solid structures with reentrant channels

Secondary pool boiling effects

Investigation of Heat Transfer Rate through Porous Material

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