Development of a reduced mechanism for methane combustion in OpenFOAM: A computational approach for efficient and accurate simulations
The primary aim of this study is to develop a more efficient reaction mechanism for accurately simulating methane combustion, with a specific focus on ignition delay, laminar flame speed, and 2-D simulated flames, while also reducing computational time. Ten reduced reaction mechanisms for methane co...
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| Format: | Article |
| Language: | English |
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Elsevier
2024-05-01
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| Series: | International Journal of Thermofluids |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S266620272400096X |
| _version_ | 1797217138690228224 |
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| author | Panit Kamma Machimontorn Promtong Chakrit Suvanjumrat |
| author_facet | Panit Kamma Machimontorn Promtong Chakrit Suvanjumrat |
| author_sort | Panit Kamma |
| collection | DOAJ |
| description | The primary aim of this study is to develop a more efficient reaction mechanism for accurately simulating methane combustion, with a specific focus on ignition delay, laminar flame speed, and 2-D simulated flames, while also reducing computational time. Ten reduced reaction mechanisms for methane combustion were evaluated, with only one, ''SK30,'' meeting the required accuracy standards. However, SK30 proved to be computationally intensive when simulating a 2-D premixed flame at a microscale. To address this challenge, a two-step reduction process was implemented. Firstly, an automated algorithm utilized direct relation graphs and sensitivity analysis with ignition delays as a reference to streamline the mechanism while maintaining accuracy. Subsequently, the second step involved identifying key reactions that had a more significant impact on flame speed than ignition delay through sensitivity analysis. Any missing reactions were then added judiciously, prioritizing the retrieval of the missing but important reactions to overall accuracy while minimizing computational cost. This process resulted in a novel mechanism comprising 25 species and 132 reactions for methane-air combustion. The validity of this mechanism was confirmed through comparison with a benchmark model, demonstrating satisfactory agreement in 1-D flame speed and 2-D premixed flame modeling. Most notably, the new mechanism substantially reduced processing time, achieving a 50 % speedup compared to SK30. |
| first_indexed | 2024-04-24T11:57:06Z |
| format | Article |
| id | doaj.art-f298257622a14fc29560949af92707a9 |
| institution | Directory Open Access Journal |
| issn | 2666-2027 |
| language | English |
| last_indexed | 2024-04-24T11:57:06Z |
| publishDate | 2024-05-01 |
| publisher | Elsevier |
| record_format | Article |
| series | International Journal of Thermofluids |
| spelling | doaj.art-f298257622a14fc29560949af92707a92024-04-09T04:13:29ZengElsevierInternational Journal of Thermofluids2666-20272024-05-0122100654Development of a reduced mechanism for methane combustion in OpenFOAM: A computational approach for efficient and accurate simulationsPanit Kamma0Machimontorn Promtong1Chakrit Suvanjumrat2Department of Mechanical Engineering, Faculty of Engineering, Mahidol University, Salaya, Nakhon Pathom 73170, Thailand; Department of Mechanical and Manufacturing Engineering, Faculty of Science and Engineering, Kasetsart University, Chalermphrakiat Sakon Nakhon Province Campus, Sakon Nakhon 47000, ThailandDepartment of Mechanical Engineering, Faculty of Engineering, Mahidol University, Salaya, Nakhon Pathom 73170, Thailand; CFD & Energy Research Group, Mahidol University, Salaya, Nakhon Pathom 73170, ThailandDepartment of Mechanical Engineering, Faculty of Engineering, Mahidol University, Salaya, Nakhon Pathom 73170, Thailand; Laboratory of Computer Mechanics for Design (LCMD), Department of Mechanical Engineering, Faculty of Engineering, Mahidol University, Salaya, Nakhon Pathom 73170, Thailand; Corresponding author.The primary aim of this study is to develop a more efficient reaction mechanism for accurately simulating methane combustion, with a specific focus on ignition delay, laminar flame speed, and 2-D simulated flames, while also reducing computational time. Ten reduced reaction mechanisms for methane combustion were evaluated, with only one, ''SK30,'' meeting the required accuracy standards. However, SK30 proved to be computationally intensive when simulating a 2-D premixed flame at a microscale. To address this challenge, a two-step reduction process was implemented. Firstly, an automated algorithm utilized direct relation graphs and sensitivity analysis with ignition delays as a reference to streamline the mechanism while maintaining accuracy. Subsequently, the second step involved identifying key reactions that had a more significant impact on flame speed than ignition delay through sensitivity analysis. Any missing reactions were then added judiciously, prioritizing the retrieval of the missing but important reactions to overall accuracy while minimizing computational cost. This process resulted in a novel mechanism comprising 25 species and 132 reactions for methane-air combustion. The validity of this mechanism was confirmed through comparison with a benchmark model, demonstrating satisfactory agreement in 1-D flame speed and 2-D premixed flame modeling. Most notably, the new mechanism substantially reduced processing time, achieving a 50 % speedup compared to SK30.http://www.sciencedirect.com/science/article/pii/S266620272400096XCFDCombustion modelMethaneOpenFOAMReduced mechanism |
| spellingShingle | Panit Kamma Machimontorn Promtong Chakrit Suvanjumrat Development of a reduced mechanism for methane combustion in OpenFOAM: A computational approach for efficient and accurate simulations International Journal of Thermofluids CFD Combustion model Methane OpenFOAM Reduced mechanism |
| title | Development of a reduced mechanism for methane combustion in OpenFOAM: A computational approach for efficient and accurate simulations |
| title_full | Development of a reduced mechanism for methane combustion in OpenFOAM: A computational approach for efficient and accurate simulations |
| title_fullStr | Development of a reduced mechanism for methane combustion in OpenFOAM: A computational approach for efficient and accurate simulations |
| title_full_unstemmed | Development of a reduced mechanism for methane combustion in OpenFOAM: A computational approach for efficient and accurate simulations |
| title_short | Development of a reduced mechanism for methane combustion in OpenFOAM: A computational approach for efficient and accurate simulations |
| title_sort | development of a reduced mechanism for methane combustion in openfoam a computational approach for efficient and accurate simulations |
| topic | CFD Combustion model Methane OpenFOAM Reduced mechanism |
| url | http://www.sciencedirect.com/science/article/pii/S266620272400096X |
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