MASS-TRANSFER IN DEVELOPING FLOWS

The aim of the present work is to check the specific problem of the de termination of mass transfer in developing flows in electrochemical ce lls. Two types of annular developing flows are studied. The first one is the axial developing flow, downstream of packed beds, which corresp onds to the reference flow either from a theoretical point of view or for the comparison with other types of fluid inlet. The second develop ing flow is the swirling decaying flow induced by a tangential inlet, which allows us to obtain high mass transfer coefficients at the inner wall of the annular cell. Both experimental and numerical study are p erformed with the aim of establishing suitable assumptions for the num erical resolution of mass transfer problems characterized by high Schm idt number. Copyright (C) 1996 Elsevier Science Ltd.