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

โœ Scribed by Moeketsi Mpholo; Tebello Mathaba; Haim H. Bau

Publisher
Elsevier Science
Year
2010
Tongue
English
Weight
754 KB
Volume
53
Category
Article
ISSN
0017-9310

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โœฆ Synopsis

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 lm) to very rough (12.53 lm), 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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โœ M. Kamil; M. Shamsuzzoha; M. Abdul Hakeem ๐Ÿ“‚ Article ๐Ÿ“… 2006 ๐Ÿ› American Institute of Chemical Engineers ๐ŸŒ English โš– 221 KB

## Abstract An analysis has been carried out to predict the boiling incipience with natural circulation flow in a reboiler tube. An equation has been proposed to estimate the wall superheat for different types of liquids covering a wide range of thermo physical properties. Incipience in liquid film