SCALING OF BOUNDARY-LAYER FLOWS DRIVEN BY DOUBLE-DIFFUSIVE CONVECTION

The objective of this paper is to investigate natural convection drive n by two buoyancy sources, such as heat and mass, in vertical boundary layers. Starting from the integral equations and using scale analysis , we derive the different asymptotic flow regimes encountered with dif ferent buoyancy forces and diffusion coefficients. Each type of how is characterized by a set of scaling relations yielding the velocity, te mperature and concentration distributions inside the fluid, and the he at and mass transfer coefficients. All our results are perfectly corro borated by numerical investigations in a wide range of parameters. Cop yright (C) 1996 Elsevier Science Ltd.