Transition from natural to mixed convection for steam–gas flow condensing along a vertical plate
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An analysis method based on two-phase boundary layer analysis has been developed to study the effects of superimposed forced convection on natural convection steam-gas flow condensing along a vertical plate. The mechanism by which superimposed forced convection enhances heat transfer is evaluated: the bulk flow blows away non-condensable gases accumulating near the interface, resulting in an elevated condensation driving force. Further, this bulk flow blowing capability may be characterized by a conventional mass transfer driving potential. Results of the new model are shown to be consistent with experimental data. Finally, a simple criterion was developed to identify transition to mixed convection from natural convection steam-gas flow. © 2008 Elsevier Ltd. All rights reserved.
author list (cited authors)
Liao, Y., Vierow, K., Dehbi, A., & Guentay, S.