FLOW STRUCTURE AND MASS TRANSFER FOR A WAVY CHANNEL IN TRANSITIONAL FLOW REGIME

JOURNAL OF CHEMICAL ENGINEERING OF JAPAN

YUJI KAWAMURA¹  YOSHIHIKO KAJIMOTO¹  ATSUSHI TARUMOTO¹  TATSUO NISHIMURA¹ 

[1] Department of Chemical Engineering, Hiroshima University

关键词: Fluid Flow;    Vortex Structure;    Transitional Flow;    Wavy Channel;    Mass Transfer;    Flow Visualization;    Electrochemical Method;   

DOI  :  10.1252/jcej.19.449

来源: Maruzen Company Ltd

【 摘 要 】

References(18)Cited-By(30)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 wavy wall 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.

【 授权许可】

Unknown