Mass transfer characteristics in a channel with symmetric wavy wall for steady flow.

Abstract

Mass transfer characteristics in a channel with symmetric wavy wall were investigated by the Leveque theory and the electrochemical method. The channel used has a geometry similar to that of the Oxford membrane blood oxygenator. The flow regime covered ranged from laminar to turbulent flow. The local Sherwood number distributions indicate that the reversed-flow region significantly differs from the forward-flow region in mass transfer characteristics. For laminar flow, mass transfer enhancementof the wavy channel is scarcely expected as compared with the corresponding straight channel, but is found to be remarkable for turbulent flow.

Enhanced heat transfer due to curvature-induced lateral vortices in laminar flows in sinusoidal corrugated-plate channels

“…The various applications considered in this work include wavy-plate-fin cores [11][12][13][14][15], and dialysis devices and membrane oxygenators [16][17][18][19][20]. Much of this literature, though, deals either with channels where the corrugated walls form convergingdiverging flow passages, or in-phase parallel wall corrugations with quite large inter-plate spacing (> twice amplitude of waviness) and/or the walls have sharp corrugations.…”

Numerical Analysis of Transitional Characteristics of Flow and Heat Transfer in Wavy Channels

“…They measured the variation of pressure drop and wall shear stress with Re and visualized the flow field by hydrogen bubbles method. T Nishimura et al [2] also studied the mass transfer coefficient for the same channel. Their research results showed that the enhancement in heat and mass transfer was due to pulsation flow in wavy channel geometry.…”

Fluid flow and mass transfer in a sinusoidal wavy‐walled tube at moderate Reynolds numbers

“…Furthermore, a remarkable increment of the Sherwood number is observed in the transitional flow regime. To compare this result with the result for the wavy-walled channel [2,25], the Sherwood and Reynolds numbers for the wavy-walled tube are redefined based on the average diameter. Figure 10 shows the mass transfer rates in the wavy-walled tube and channel; here Re c is the Reynolds number corresponding to the transitional flow regime.…”

“…Experimental and numerical studies on heat and mass transfer enhancement at moderate Reynolds numbers aimed at obtaining superior performance for compact heat exchangers-the catalytic reactor and the bioreactor-were carried out by utilizing the fluid mixing generated through unsteady, separated and reattached flows [1][2][3][4][5][6]. Most such studies were conducted in the two-dimensional channels with a rectangular cross section.…”