Global luminescent oil-film skin-friction meter

Tianshu Liu, J. Montefort, S. Woodiga, P. Merati, Lixin Shen

Research output: Contribution to journalArticlepeer-review

88 Scopus citations


This paper describes a global luminescent oil-film skin-friction meter that is particularly useful in global skin-friction diagnostics for complex flows. This method is developed based on the relationship between the oil-film thickness and luminescent intensity of an oil film doped with luminescent molecules. The projected thin oil-film equation is given in the image plane, which relates skin friction with the normalized luminescent intensity. A variational formulation with a smoothness constraint on skin friction is given, and the corresponding Euler-Langrage equations are solved to obtain a snapshot solution for a relative skin-friction field. Successive snapshot solutions are superposed to reconstruct a complete relative skin-friction field, and the corresponding absolute field can be further determined by in situ calibration. This method is examined through numerical simulation and experiments.

Original languageEnglish (US)
Pages (from-to)476-485
Number of pages10
JournalAIAA journal
Issue number2
StatePublished - Feb 2008

ASJC Scopus subject areas

  • Aerospace Engineering


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