A Study on the Effect of Flow Unsteadiness on the Yield of a Chemical Reaction in a T Micro-Reactor
Despite the very simple geometry and the laminar flow, T-shaped microreactors have been found to be characterized by different and complex steady and unsteady flow regimes, depending on the Reynolds number. In particular, flow unsteadiness modifies strongly the mixing process; however, little is kno...
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-02-01
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| Series: | Micromachines |
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| Online Access: | https://www.mdpi.com/2072-666X/12/3/242 |
| _version_ | 1797417194994270208 |
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| author | Alessandro Mariotti Matteo Antognoli Chiara Galletti Roberto Mauri Maria Vittoria Salvetti Elisabetta Brunazzi |
| author_facet | Alessandro Mariotti Matteo Antognoli Chiara Galletti Roberto Mauri Maria Vittoria Salvetti Elisabetta Brunazzi |
| author_sort | Alessandro Mariotti |
| collection | DOAJ |
| description | Despite the very simple geometry and the laminar flow, T-shaped microreactors have been found to be characterized by different and complex steady and unsteady flow regimes, depending on the Reynolds number. In particular, flow unsteadiness modifies strongly the mixing process; however, little is known on how this change may affect the yield of a chemical reaction. In the present work, experiments and 3-dimensional numerical simulations are carried out jointly to analyze mixing and reaction in a T-shaped microreactor with the ultimate goal to investigate how flow unsteadiness affects the reaction yield. The onset of the unsteady asymmetric regime enhances the reaction yield by more than <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mn>30</mn><mo>%</mo></mrow></semantics></math></inline-formula>; however, a strong decrease of the yield back to values typical of the vortex regime is observed when the flow undergoes a transition to the unsteady symmetric regime. |
| first_indexed | 2024-03-09T06:16:16Z |
| format | Article |
| id | doaj.art-07c6c7f049a149b6aac7022d52c6a5e7 |
| institution | Directory Open Access Journal |
| issn | 2072-666X |
| language | English |
| last_indexed | 2024-03-09T06:16:16Z |
| publishDate | 2021-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Micromachines |
| spelling | doaj.art-07c6c7f049a149b6aac7022d52c6a5e72023-12-03T11:52:51ZengMDPI AGMicromachines2072-666X2021-02-0112324210.3390/mi12030242A Study on the Effect of Flow Unsteadiness on the Yield of a Chemical Reaction in a T Micro-ReactorAlessandro Mariotti0Matteo Antognoli1Chiara Galletti2Roberto Mauri3Maria Vittoria Salvetti4Elisabetta Brunazzi5Dipartimento di Ingegneria Civile e Industriale, Università di Pisa, Largo Lazzarino 2, 56122 Pisa, ItalyDipartimento di Ingegneria Civile e Industriale, Università di Pisa, Largo Lazzarino 2, 56122 Pisa, ItalyDipartimento di Ingegneria Civile e Industriale, Università di Pisa, Largo Lazzarino 2, 56122 Pisa, ItalyDipartimento di Ingegneria Civile e Industriale, Università di Pisa, Largo Lazzarino 2, 56122 Pisa, ItalyDipartimento di Ingegneria Civile e Industriale, Università di Pisa, Largo Lazzarino 2, 56122 Pisa, ItalyDipartimento di Ingegneria Civile e Industriale, Università di Pisa, Largo Lazzarino 2, 56122 Pisa, ItalyDespite the very simple geometry and the laminar flow, T-shaped microreactors have been found to be characterized by different and complex steady and unsteady flow regimes, depending on the Reynolds number. In particular, flow unsteadiness modifies strongly the mixing process; however, little is known on how this change may affect the yield of a chemical reaction. In the present work, experiments and 3-dimensional numerical simulations are carried out jointly to analyze mixing and reaction in a T-shaped microreactor with the ultimate goal to investigate how flow unsteadiness affects the reaction yield. The onset of the unsteady asymmetric regime enhances the reaction yield by more than <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mn>30</mn><mo>%</mo></mrow></semantics></math></inline-formula>; however, a strong decrease of the yield back to values typical of the vortex regime is observed when the flow undergoes a transition to the unsteady symmetric regime.https://www.mdpi.com/2072-666X/12/3/242T-shaped micro-mixerunsteady flow regimesmixing degreereaction yieldexperiments and numerical simulations |
| spellingShingle | Alessandro Mariotti Matteo Antognoli Chiara Galletti Roberto Mauri Maria Vittoria Salvetti Elisabetta Brunazzi A Study on the Effect of Flow Unsteadiness on the Yield of a Chemical Reaction in a T Micro-Reactor Micromachines T-shaped micro-mixer unsteady flow regimes mixing degree reaction yield experiments and numerical simulations |
| title | A Study on the Effect of Flow Unsteadiness on the Yield of a Chemical Reaction in a T Micro-Reactor |
| title_full | A Study on the Effect of Flow Unsteadiness on the Yield of a Chemical Reaction in a T Micro-Reactor |
| title_fullStr | A Study on the Effect of Flow Unsteadiness on the Yield of a Chemical Reaction in a T Micro-Reactor |
| title_full_unstemmed | A Study on the Effect of Flow Unsteadiness on the Yield of a Chemical Reaction in a T Micro-Reactor |
| title_short | A Study on the Effect of Flow Unsteadiness on the Yield of a Chemical Reaction in a T Micro-Reactor |
| title_sort | study on the effect of flow unsteadiness on the yield of a chemical reaction in a t micro reactor |
| topic | T-shaped micro-mixer unsteady flow regimes mixing degree reaction yield experiments and numerical simulations |
| url | https://www.mdpi.com/2072-666X/12/3/242 |
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