Impact of Baffle Geometry and Baffle Number on Vortex Formation in Single‐Stage Radial Stirring Systems.
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| Title: | Impact of Baffle Geometry and Baffle Number on Vortex Formation in Single‐Stage Radial Stirring Systems. |
|---|---|
| Authors: | Lenters, Laura1,2,3 (AUTHOR), Ulbricht, Mathias3 (AUTHOR), Schultz, Heyko Jürgen1,2 (AUTHOR) heyko_juergen.schultz@hs-niederrhein.de, Biswas, Arnab (AUTHOR) arnbiswas@wiley.com |
| Source: | International Journal of Chemical Engineering (1687806X). 5/13/2026, Vol. 2026, p1-18. 18p. |
| Subjects: | Vortex motion, Impellers, Fluid dynamics, Dimensionless numbers, Chemical reactors |
| Abstract: | In stirred tank reactors, vortices are currently predicted using an outdated dimensionless baffle index that does not correspond to state of the art in science and technology. However, it is extremely important to know when a vortex occurs because they have various advantages and disadvantages. For this reason, knowledge about vortices, especially in reactor systems with baffles, is of great importance to the production and process industry. In order to close this significant knowledge gap, this study presents comprehensive and detailed results from experiments conducted on a laboratory scale of 110 mm for the evaluation, prediction, or prevention of vortices in a Reynolds number ranging from 1,000 to 45,000, as well as providing a definition of vortices for the first time. For the investigations, two single‐stage radial stirrers, the Rushton turbine and the curved‐blade impeller, with varying numbers of baffles between zero and six, and different baffle geometries (rectangular, cylindrical, and triangular) are analyzed in water. The power consumption, vortex characteristics, and influence of the baffled state are examined. The vortices present are detected using MATLAB macros and described mathematically with a fourth‐degree polynomial function. The obtained vortex shape (depth, width, and volume) is presented as a mathematical relationship. Furthermore, this study provides, for the first time, dimensionless values for vortex depth, width, and volume. These dimensionless values can be used as design rules, assistance, or recommendation. This allows more accurate predictions about vortices in large reactors in order to simplify the design and better positioning of internal installations to make stirred tank reactors more economical and sustainable in the future. [ABSTRACT FROM AUTHOR] |
| Copyright of International Journal of Chemical Engineering (1687806X) is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
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| Header | DbId: egs DbLabel: Engineering Source An: 193710608 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Impact of Baffle Geometry and Baffle Number on Vortex Formation in Single‐Stage Radial Stirring Systems. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Lenters%2C+Laura%22">Lenters, Laura</searchLink><relatesTo>1,2,3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Ulbricht%2C+Mathias%22">Ulbricht, Mathias</searchLink><relatesTo>3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Schultz%2C+Heyko+Jürgen%22">Schultz, Heyko Jürgen</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<i> heyko_juergen.schultz@hs-niederrhein.de</i><br /><searchLink fieldCode="AR" term="%22Biswas%2C+Arnab%22">Biswas, Arnab</searchLink> (AUTHOR)<i> arnbiswas@wiley.com</i> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22International+Journal+of+Chemical+Engineering+%281687806X%29%22">International Journal of Chemical Engineering (1687806X)</searchLink>. 5/13/2026, Vol. 2026, p1-18. 18p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Vortex+motion%22">Vortex motion</searchLink><br /><searchLink fieldCode="DE" term="%22Impellers%22">Impellers</searchLink><br /><searchLink fieldCode="DE" term="%22Fluid+dynamics%22">Fluid dynamics</searchLink><br /><searchLink fieldCode="DE" term="%22Dimensionless+numbers%22">Dimensionless numbers</searchLink><br /><searchLink fieldCode="DE" term="%22Chemical+reactors%22">Chemical reactors</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: In stirred tank reactors, vortices are currently predicted using an outdated dimensionless baffle index that does not correspond to state of the art in science and technology. However, it is extremely important to know when a vortex occurs because they have various advantages and disadvantages. For this reason, knowledge about vortices, especially in reactor systems with baffles, is of great importance to the production and process industry. In order to close this significant knowledge gap, this study presents comprehensive and detailed results from experiments conducted on a laboratory scale of 110 mm for the evaluation, prediction, or prevention of vortices in a Reynolds number ranging from 1,000 to 45,000, as well as providing a definition of vortices for the first time. For the investigations, two single‐stage radial stirrers, the Rushton turbine and the curved‐blade impeller, with varying numbers of baffles between zero and six, and different baffle geometries (rectangular, cylindrical, and triangular) are analyzed in water. The power consumption, vortex characteristics, and influence of the baffled state are examined. The vortices present are detected using MATLAB macros and described mathematically with a fourth‐degree polynomial function. The obtained vortex shape (depth, width, and volume) is presented as a mathematical relationship. Furthermore, this study provides, for the first time, dimensionless values for vortex depth, width, and volume. These dimensionless values can be used as design rules, assistance, or recommendation. This allows more accurate predictions about vortices in large reactors in order to simplify the design and better positioning of internal installations to make stirred tank reactors more economical and sustainable in the future. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of International Journal of Chemical Engineering (1687806X) is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1155/ijce/7811583 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 18 StartPage: 1 Subjects: – SubjectFull: Vortex motion Type: general – SubjectFull: Impellers Type: general – SubjectFull: Fluid dynamics Type: general – SubjectFull: Dimensionless numbers Type: general – SubjectFull: Chemical reactors Type: general Titles: – TitleFull: Impact of Baffle Geometry and Baffle Number on Vortex Formation in Single‐Stage Radial Stirring Systems. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Lenters, Laura – PersonEntity: Name: NameFull: Ulbricht, Mathias – PersonEntity: Name: NameFull: Schultz, Heyko Jürgen – PersonEntity: Name: NameFull: Biswas, Arnab IsPartOfRelationships: – BibEntity: Dates: – D: 13 M: 05 Text: 5/13/2026 Type: published Y: 2026 Identifiers: – Type: issn-print Value: 1687806X Numbering: – Type: volume Value: 2026 Titles: – TitleFull: International Journal of Chemical Engineering (1687806X) Type: main |
| ResultId | 1 |
