Buoyancy-driven convection in plane Poiseuille flow

Buoyancy effects in plane Poiseuille flow heated isothermally from below we re analyzed. By employing the propagation theory we have developed the crit ical streamwise position to mark the onset of stationary longitudinal vorte x rolls was predicted as a function of the Prandtl number. Combining the pr esent stability criteria with the boundary-layer instability model, a new c orrelation of transport properties on mixed convection was derived. Even th ough the present modelling is rather simple, theoretical results compare we ll with experiments of both air and ionic mass transfer in aqueous CuSO4 so lution systems. (C) 1999 Elsevier Science Ltd. All rights reserved.