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Thermophoretically enhanced mass transport rates to solid and transpiration-cooled walls across turbulent (law-of-the-wall) boundary layersConvective-diffusion mass transfer rate predictions are made for both solid wall and transpiration-cooled 'law-of-the-wall' nonisothermal turbulent boundary layers (TBLs), including the mechanism of thermophoresis, i.e., small particle mass transport 'down a temperature gradient'. The present calculations are confined to low mass-loading situations but span the entire particle size range from vapor molecules to particles near the onset of inertial ('eddy') impaction. It is shown that, when Sc is much greater than 1, thermophoresis greatly increases particle deposition rates to internally cooled solid walls, but only partially offsets the appreciable reduction in deposition rates associated with dust-free gas-transpiration-cooled surfaces. Thus, efficient particle sampling from hot dusty gases can be carried out using transpiration 'shielded' probe surfaces.
Document ID
19890024969
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Gokoglu, Suleyman A.
(Yale Univ. New Haven, CT, United States)
Rosner, Daniel E.
(Yale University New Haven, CT, United States)
Date Acquired
August 13, 2013
Publication Date
May 1, 1985
Publication Information
Publication: I & EC - Industrial and Engineering Chemistry, Fundamentals
Volume: 24
ISSN: 0196-4313
Subject Category
Fluid Mechanics And Heat Transfer
Accession Number
89A12340
Funding Number(s)
CONTRACT_GRANT: NAG3-201
CONTRACT_GRANT: F49620-82-K-0020
Distribution Limits
Public
Copyright
Other

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