roughness factor (rugosity)

of a surface

The ratio:

$f r = A r A g$

where $A r$ is the real (true, actual) surface (interface) area and $A g$ is the geometric surface (interface) area.

Source:

PAC, 1986, 58, 437 (Interphases in systems of conducting phases (Recommendations 1985)) on page 439

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Cite as:
IUPAC. Compendium of Chemical Terminology, 2nd ed. (the "Gold Book"). Compiled by A. D. McNaught and A. Wilkinson. Blackwell Scientific Publications, Oxford (1997). XML on-line corrected version: http://goldbook.iupac.org (2006-) created by M. Nic, J. Jirat, B. Kosata; updates compiled by A. Jenkins. ISBN 0-9678550-9-8. doi:10.1351/goldbook.

Last update: 2012-08-19; version: 2.3.2.

DOI of this term: doi:10.1351/goldbook.R05419.

Original PDF version: http://www.iupac.org/goldbook/R05419.pdf. The PDF version is out of date and is provided for reference purposes only. For some entries, the PDF version may be unavailable.

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