Semi-mechanistic model for the interfacial velocity of gravity-driven laminar wavy film flow and its validation using infrared particle tracing velocimetry

Muritala Alade Amidu, Hyungdae Kim

Research output: Contribution to journalArticlepeer-review

Abstract

Interfacial velocity is an important parameter in the modeling of momentum transfer for prediction of heat- and mass-transfer during film-wise condensation. In this study, the interfacial velocity is modeled using an empirical power-law velocity profile with the assumption that the interfacial shear stress is negligible compared with the wall shear stress. A non-intrusive infrared particle tracking velocimetry (IR-PTV) measurement technique is used to validate a newly proposed semi-mechanistic model for the interfacial velocity of a gravity-driven laminar wavy film flow. The proposed model predicts measured interfacial velocities reasonably well and could serve as a closure relation in estimating the film-wise condensation heat transfer coefficient.

Original languageEnglish
Pages (from-to)1535-1544
Number of pages10
JournalHeat and Mass Transfer
Volume55
Issue number5
DOIs
Publication statusPublished - 1 May 2019

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