Literature Cited 1) Akita, K. and F. Yoshida: Ind. Eng. Chem., Process Des. Dev., 13, 84 (1974).2) Cova, D. R.: Ind. Eng. Chem., ProcessDes. Dev., 5, 20 (1966 The relationship between flow structure and mass transfer in a wavy channel was investigated in the range from laminar to turbulent flow. Laminar flow has a steady two-dimensional structure, but turbulent flow has an unsteady three-dimensional vortical structure. In particular, the flow field in a large recirculation vortex within the furrow of a wavywall shows an intermittent reversed flow and a nonuniformity of flow in the spanwise direction for turbulent flow. The flow intermittency is closely related to the mass transfer, and a remarkable increment of mass transfer rate is induced near the flow reattachment point in the large recirculation vortex, which suggests a renewal of the concentration boundary layer because of the flow intermittency.
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