Flow dynamics in Taylor–Couette flow reactor with axial distribution of temperature |
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| Authors: | Hayato Masuda Saho Yoshida Takafumi Horie Naoto Ohmura Makoto Shimoyamada |
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| Affiliation: | 1. School of Food and Nutritional Science, University of Shizuoka, 52‐1 Yada, Suruga, Shizuoka 422‐8526, Japan;2. Complex Fluid and Thermal Engineering Research Center (COFTEC), Kobe University, 1‐1 Rokkodai, Nada, Kobe 657‐8501, Japan;3. Dept. of Chemical Science and Engineering, Kobe University, 1‐1 Rokkodai, Nada, Kobe 657‐8501, Japan |
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| Abstract: | In this study, the flow dynamics of a Taylor–Couette flow with an axial distribution of temperature was experimentally investigated. The flow can be classified into three patterns based on the balance between the centrifugal force and the buoyancy. If the buoyancy is dominant, global heat convection is observed instead of Taylor vortices (Case I). When the buoyancy is comparable to the centrifugal force, the Taylor vortices and global heat convection appear alternately (Case II). If the centrifugal force is sufficiently high to suppress the buoyancy, stable Taylor vortices are observed (Case III). The characteristics of the mixing/diffusion are investigated by conducting a decolorization experiment on a passive tracer. In Case II, the tracer is rapidly decolorized in the presence of the global heat convection instead of the Taylor vortices. This result implies that the interaction between the centrifugal force and the buoyancy would induce an anomalous transport. © 2017 American Institute of Chemical Engineers AIChE J, 64: 1075–1082, 2018 |
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| Keywords: | Taylor– Couette flow heat convection flow visualization mixing enhancement |
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