NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Thermophoretically augmented mass transfer rates to solid walls across laminar boundary layersPredictions of mass transfer (heavy vapor and small particle deposition) rates to solid walls, including the effects of thermal (Soret) diffusion ('thermophoresis' for small particles), are made by numerically solving the two-dimensional self-similar forced convection laminar boundary-layer equations with variable properties, covering the particle size range from vapor molecules up to the size threshold for inertial (dynamical nonequilibrium) effects. The effect of thermophoresis is predicted to be particularly important for submicron particle deposition on highly cooled solid surfaces, with corresponding enhancement factors at atmospheric conditions being over a thousand-fold at T(w)/T(e) equal to about 0.6. As a consequence of this mass transfer mechanism, the particle size dependence of the mass transfer coefficient to a cooled wall will be much weaker than for the corresponding case of isothermal capture by Brownian-convective diffusion.
Document ID
19860035412
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Gokoglu, S. A.
(NASA Lewis Research Center Cleveland, OH; Yale University, New Haven, CT, United States)
Rosner, D. E.
(Yale University New Haven, CT, United States)
Date Acquired
August 12, 2013
Publication Date
January 1, 1986
Publication Information
Publication: AIAA Journal
Volume: 24
ISSN: 0001-1452
Subject Category
Fluid Mechanics And Heat Transfer
Accession Number
86A20150
Funding Number(s)
CONTRACT_GRANT: F49620-82-K-0020
CONTRACT_GRANT: NAG3-201
Distribution Limits
Public
Copyright
Other

Available Downloads

There are no available downloads for this record.
No Preview Available