A 2D analysis of surface roughness for prediction of boiling incipience

Moeketsi Mpholo; Tebello Mathaba; Haim H. Bau

doi:10.1016/j.ijheatmasstransfer.2009.12.030

A 2D analysis of surface roughness for prediction of boiling incipience

Moeketsi Mpholo, Tebello Mathaba, Haim H. Bau

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

15 Citations (Scopus)

Abstract

Surface roughness is well known to affect the initiation of boiling. Analysis of cavities on surfaces with a wide range of RMS roughness is carried out. Five aluminium surfaces, from polished (0.062 μm) to very rough (12.53 μm), are studied. The statistical cavity distribution obtained from 2D cross-sectional profile is discussed. The results obtained show that the cavity distribution on the surface is homogeneous. Moreover, small cavities enclosed in bigger cavities are observed to be the major independent nucleation sites.

Original language	English
Pages (from-to)	1313-1318
Number of pages	6
Journal	International Journal of Heat and Mass Transfer
Volume	53
Issue number	7-8
DOIs	https://doi.org/10.1016/j.ijheatmasstransfer.2009.12.030
Publication status	Published - Mar 2010
Externally published	Yes

Keywords

Boiling incipience
Nucleate boiling
Surface roughness
Vapour traps

ASJC Scopus subject areas

Condensed Matter Physics
Mechanical Engineering
Fluid Flow and Transfer Processes

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10.1016/j.ijheatmasstransfer.2009.12.030

Cite this

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abstract = "Surface roughness is well known to affect the initiation of boiling. Analysis of cavities on surfaces with a wide range of RMS roughness is carried out. Five aluminium surfaces, from polished (0.062 μm) to very rough (12.53 μm), are studied. The statistical cavity distribution obtained from 2D cross-sectional profile is discussed. The results obtained show that the cavity distribution on the surface is homogeneous. Moreover, small cavities enclosed in bigger cavities are observed to be the major independent nucleation sites.",

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AU - Mathaba, Tebello

AU - Bau, Haim H.

PY - 2010/3

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AB - Surface roughness is well known to affect the initiation of boiling. Analysis of cavities on surfaces with a wide range of RMS roughness is carried out. Five aluminium surfaces, from polished (0.062 μm) to very rough (12.53 μm), are studied. The statistical cavity distribution obtained from 2D cross-sectional profile is discussed. The results obtained show that the cavity distribution on the surface is homogeneous. Moreover, small cavities enclosed in bigger cavities are observed to be the major independent nucleation sites.

KW - Boiling incipience

KW - Nucleate boiling

KW - Surface roughness

KW - Vapour traps

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IS - 7-8

ER -

A 2D analysis of surface roughness for prediction of boiling incipience

Abstract

Keywords

ASJC Scopus subject areas

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