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Small particle transport across turbulent nonisothermal boundary layersThe interaction between turbulent diffusion, Brownian diffusion, and particle thermophoresis in the limit of vanishing particle inertial effects is quantitatively modeled for applications in gas turbines. The model is initiated with consideration of the particle phase mass conservation equation for a two-dimensional boundary layer, including the thermophoretic flux term directed toward the cold wall. A formalism of a turbulent flow near a flat plate in a heat transfer problem is adopted, and variable property effects are neglected. Attention is given to the limit of very large Schmidt numbers and the particle concentration depletion outside of the Brownian sublayer. It is concluded that, in the parameter range of interest, thermophoresis augments the high Schmidt number mass-transfer coefficient by a factor equal to the product of the outer sink and the thermophoretic suction.
Document ID
19830029432
Document Type
Reprint (Version printed in journal)
Authors
Rosner, D. E. (Yale Univ. New Haven, CT, United States)
Fernandez De La Mora, J. (Yale University New Haven, CT, United States)
Date Acquired
August 11, 2013
Publication Date
October 1, 1982
Subject Category
FLUID MECHANICS AND HEAT TRANSFER
Funding Number(s)
CONTRACT_GRANT: NAG3-201
CONTRACT_GRANT: F49620-76-C-0020
Distribution Limits
Public
Copyright
Other