2-D and 3-D modulated porous coatings for enhanced pool boiling

D. H. Min; G. S. Hwang; Y. Usta; O. N. Cora; M. Koc; M. Kaviany

doi:10.1016/j.ijheatmasstransfer.2008.12.018

2-D and 3-D modulated porous coatings for enhanced pool boiling

D. H. Min, G. S. Hwang, Y. Usta, O. N. Cora, M. Koc, M. Kaviany^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

113 Citations (Scopus)

Abstract

A new fabrication method (hot-powder compaction) is developed to readily make 2-D and 3-D modulated coatings for enhanced pool-boiling performance. The modulated coatings are 2-D and 3-D stacks with different height, width, and pitch (modulation wavelength), and made with different particle diameters and porosities. The maximum measured critical heat flux (q_CHF) of 2-D and 3-D modulated coatings are 3.3 and 2.0 times that of the surface without coatings (plain). As expected from the hydrodynamic stability theory, the experimental results for 2-D coatings are similar to 3-D coatings and show that q_CHF strongly depends on the modulation wavelength, while particle diameter and porosity have a little effects. The results also suggest that a stack aspect ratio (height to pitch) larger than unity is needed for modulation enhancement of the critical heat flux.

Original language	English
Pages (from-to)	2607-2613
Number of pages	7
Journal	International Journal of Heat and Mass Transfer
Volume	52
Issue number	11-12
DOIs	https://doi.org/10.1016/j.ijheatmasstransfer.2008.12.018
Publication status	Published - May 2009
Externally published	Yes

Keywords

2-D and 3-D modulations
Critical heat flux
Enhanced pool boiling
Modulated porous coating
Wick superheat

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10.1016/j.ijheatmasstransfer.2008.12.018

Cite this

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title = "2-D and 3-D modulated porous coatings for enhanced pool boiling",

abstract = "A new fabrication method (hot-powder compaction) is developed to readily make 2-D and 3-D modulated coatings for enhanced pool-boiling performance. The modulated coatings are 2-D and 3-D stacks with different height, width, and pitch (modulation wavelength), and made with different particle diameters and porosities. The maximum measured critical heat flux (qCHF) of 2-D and 3-D modulated coatings are 3.3 and 2.0 times that of the surface without coatings (plain). As expected from the hydrodynamic stability theory, the experimental results for 2-D coatings are similar to 3-D coatings and show that qCHF strongly depends on the modulation wavelength, while particle diameter and porosity have a little effects. The results also suggest that a stack aspect ratio (height to pitch) larger than unity is needed for modulation enhancement of the critical heat flux.",

keywords = "2-D and 3-D modulations, Critical heat flux, Enhanced pool boiling, Modulated porous coating, Wick superheat",

author = "Min, {D. H.} and Hwang, {G. S.} and Y. Usta and Cora, {O. N.} and M. Koc and M. Kaviany",

year = "2009",

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doi = "10.1016/j.ijheatmasstransfer.2008.12.018",

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AU - Min, D. H.

AU - Hwang, G. S.

AU - Usta, Y.

AU - Cora, O. N.

AU - Koc, M.

AU - Kaviany, M.

PY - 2009/5

Y1 - 2009/5

N2 - A new fabrication method (hot-powder compaction) is developed to readily make 2-D and 3-D modulated coatings for enhanced pool-boiling performance. The modulated coatings are 2-D and 3-D stacks with different height, width, and pitch (modulation wavelength), and made with different particle diameters and porosities. The maximum measured critical heat flux (qCHF) of 2-D and 3-D modulated coatings are 3.3 and 2.0 times that of the surface without coatings (plain). As expected from the hydrodynamic stability theory, the experimental results for 2-D coatings are similar to 3-D coatings and show that qCHF strongly depends on the modulation wavelength, while particle diameter and porosity have a little effects. The results also suggest that a stack aspect ratio (height to pitch) larger than unity is needed for modulation enhancement of the critical heat flux.

AB - A new fabrication method (hot-powder compaction) is developed to readily make 2-D and 3-D modulated coatings for enhanced pool-boiling performance. The modulated coatings are 2-D and 3-D stacks with different height, width, and pitch (modulation wavelength), and made with different particle diameters and porosities. The maximum measured critical heat flux (qCHF) of 2-D and 3-D modulated coatings are 3.3 and 2.0 times that of the surface without coatings (plain). As expected from the hydrodynamic stability theory, the experimental results for 2-D coatings are similar to 3-D coatings and show that qCHF strongly depends on the modulation wavelength, while particle diameter and porosity have a little effects. The results also suggest that a stack aspect ratio (height to pitch) larger than unity is needed for modulation enhancement of the critical heat flux.

KW - 2-D and 3-D modulations

KW - Critical heat flux

KW - Enhanced pool boiling

KW - Modulated porous coating

KW - Wick superheat

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JF - International Journal of Heat and Mass Transfer

IS - 11-12

ER -

2-D and 3-D modulated porous coatings for enhanced pool boiling

Abstract

Keywords

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