Journal
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
Volume 53, Issue 7-8, Pages 1313-1318Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijheatmasstransfer.2009.12.030
Keywords
Surface roughness; Nucleate boiling; Boiling incipience; Vapour traps
Categories
Funding
- Materials Research and Engineering Center at the University of Pennsylvania [DMR-0520020]
- Purdue Research Foundation
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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 mu m) to very rough (12.53 mu m), 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. (C) 2009 Elsevier Ltd. All rights reserved.
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