Mass transfer in turbulent impinging slot jets

The mass transfer characteristics of a turbulent slot jet impinging normally on a target wall are examined using numerical simulations. Al the location where the slot jet emerges from the nozzle, a confinement plate is placed parallel to the target plate. The jet fluid is the same as the otherwise stagnant fluid into which the jet emerges. Fluid flow is modeled using the k-omega turbulence model of Wilcox [1]. The computations are validated against existing experimental fluid flow, heat transfer and mass transfer data. The range of Reynolds numbers examined is from 450 to 20 000 with Prandtl or Schmidt numbers from 1 to 2400. The distance of the target plate from the slot jet varies between 2 and 8 times the slot jet width. The study reveals computational aspects that are unique to the solution of flow and mass transfer problems with the combination of high Schmidt numbers and turbulent flows. (C) 1998 Elsevier Science Ltd. All rights reserved.