Effect of Temperature Change on Geometric Structure of Isolated Mixing Regions in Stirred Vessel
The present work experimentally investigated the effect of temperature change on the geometric structure of isolated mixing regions (IMRs) in a stirred vessel by the decolorization of fluorescent green dye by acid-base neutralization. A four-bladed Rushton turbine was installed in an unbaffled stirr...
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| Format: | Article |
| Language: | English |
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Wiley
2012-01-01
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| Series: | International Journal of Chemical Engineering |
| Online Access: | http://dx.doi.org/10.1155/2012/287051 |
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| author | Nor Hanizah Shahirudin Alatengtuya Norihisa Kumagai Takafumi Horie Naoto Ohmura |
| author_facet | Nor Hanizah Shahirudin Alatengtuya Norihisa Kumagai Takafumi Horie Naoto Ohmura |
| author_sort | Nor Hanizah Shahirudin |
| collection | DOAJ |
| description | The present work experimentally investigated the effect of temperature change on the geometric structure of isolated mixing regions (IMRs) in a stirred vessel by the decolorization of fluorescent green dye by acid-base neutralization. A four-bladed Rushton turbine was installed in an unbaffled stirred vessel filled with glycerin as a working fluid. The temperature of working fluid was changed in a stepwise manner from 30°C to a certain fixed value by changing the temperature of the water jacket that the vessel was equipped with. The step temperature change can dramatically reduce the elimination time of IMRs, as compared with a steady temperature operation. During the transient process from an initial state to disappearance of IMR, the IMR showed interesting three-dimensional geometrical changes, that are, simple torus with single filament, simple torus without filaments, a combination of crescent shape and circular tori, and doubly entangled torus. |
| format | Article |
| id | doaj-art-3e0385ea6a154651a1ea56b8f801ef24 |
| institution | Kabale University |
| issn | 1687-806X 1687-8078 |
| language | English |
| publishDate | 2012-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | International Journal of Chemical Engineering |
| spelling | doaj-art-3e0385ea6a154651a1ea56b8f801ef242025-02-03T01:06:20ZengWileyInternational Journal of Chemical Engineering1687-806X1687-80782012-01-01201210.1155/2012/287051287051Effect of Temperature Change on Geometric Structure of Isolated Mixing Regions in Stirred VesselNor Hanizah Shahirudin0Alatengtuya1Norihisa Kumagai2Takafumi Horie3Naoto Ohmura4Department of Chemical Science and Engineering, Kobe University, 1-1 Rokkodai, Nada, Hyogo, Kobe 657-8501, JapanDepartment of Chemical Science and Engineering, Kobe University, 1-1 Rokkodai, Nada, Hyogo, Kobe 657-8501, JapanDepartment of Chemical Science and Engineering, Kobe University, 1-1 Rokkodai, Nada, Hyogo, Kobe 657-8501, JapanDepartment of Chemical Science and Engineering, Kobe University, 1-1 Rokkodai, Nada, Hyogo, Kobe 657-8501, JapanDepartment of Chemical Science and Engineering, Kobe University, 1-1 Rokkodai, Nada, Hyogo, Kobe 657-8501, JapanThe present work experimentally investigated the effect of temperature change on the geometric structure of isolated mixing regions (IMRs) in a stirred vessel by the decolorization of fluorescent green dye by acid-base neutralization. A four-bladed Rushton turbine was installed in an unbaffled stirred vessel filled with glycerin as a working fluid. The temperature of working fluid was changed in a stepwise manner from 30°C to a certain fixed value by changing the temperature of the water jacket that the vessel was equipped with. The step temperature change can dramatically reduce the elimination time of IMRs, as compared with a steady temperature operation. During the transient process from an initial state to disappearance of IMR, the IMR showed interesting three-dimensional geometrical changes, that are, simple torus with single filament, simple torus without filaments, a combination of crescent shape and circular tori, and doubly entangled torus.http://dx.doi.org/10.1155/2012/287051 |
| spellingShingle | Nor Hanizah Shahirudin Alatengtuya Norihisa Kumagai Takafumi Horie Naoto Ohmura Effect of Temperature Change on Geometric Structure of Isolated Mixing Regions in Stirred Vessel International Journal of Chemical Engineering |
| title | Effect of Temperature Change on Geometric Structure of Isolated Mixing Regions in Stirred Vessel |
| title_full | Effect of Temperature Change on Geometric Structure of Isolated Mixing Regions in Stirred Vessel |
| title_fullStr | Effect of Temperature Change on Geometric Structure of Isolated Mixing Regions in Stirred Vessel |
| title_full_unstemmed | Effect of Temperature Change on Geometric Structure of Isolated Mixing Regions in Stirred Vessel |
| title_short | Effect of Temperature Change on Geometric Structure of Isolated Mixing Regions in Stirred Vessel |
| title_sort | effect of temperature change on geometric structure of isolated mixing regions in stirred vessel |
| url | http://dx.doi.org/10.1155/2012/287051 |
| work_keys_str_mv | AT norhanizahshahirudin effectoftemperaturechangeongeometricstructureofisolatedmixingregionsinstirredvessel AT alatengtuya effectoftemperaturechangeongeometricstructureofisolatedmixingregionsinstirredvessel AT norihisakumagai effectoftemperaturechangeongeometricstructureofisolatedmixingregionsinstirredvessel AT takafumihorie effectoftemperaturechangeongeometricstructureofisolatedmixingregionsinstirredvessel AT naotoohmura effectoftemperaturechangeongeometricstructureofisolatedmixingregionsinstirredvessel |