Modeling flame acceleration in H2 turbulent combustion: Strategies to reduce computational cost
Reducing the computational cost of fluid dynamics simulations is one of the main challenges in many complex industrial flows’ problems. This challenge becomes more crucial in nuclear safety applications, such as the simulation of accident sequences in large volumes. The present study summarizes the...
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Elsevier
2025-03-01
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| Series: | Results in Engineering |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2590123025002105 |
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| author | A. Dahmani R.A. Otón-Martínez F. Nicolás-Pérez F.J.S. Velasco O. de Francisco |
| author_facet | A. Dahmani R.A. Otón-Martínez F. Nicolás-Pérez F.J.S. Velasco O. de Francisco |
| author_sort | A. Dahmani |
| collection | DOAJ |
| description | Reducing the computational cost of fluid dynamics simulations is one of the main challenges in many complex industrial flows’ problems. This challenge becomes more crucial in nuclear safety applications, such as the simulation of accident sequences in large volumes. The present study summarizes the investigations conducted to identify and assess reliable modeling strategies for reducing computational cost for the simulations of hydrogen turbulent combustion in nuclear accident scenarios which consider the flame acceleration, with a primary focus on the use of LES coupled with Artificially Thickened Flame Model (TFM) using a detailed chemical reaction mechanism. For this purpose, the LES-TFM model was benchmarked against experimental data of flame acceleration in a tube for lean mixtures. The obtained results show that LES-TFM model with a detailed 12-reaction chemical kinetics can predict flame acceleration. Moreover, the use of a dynamic grid refinement with an initial coarser mesh with LES-TFM is found to overestimate the time lapse of the initial low-velocity stage of the sequence. However, it permits to simulate the flame acceleration dynamics. Finally, using an effective Lewis of the mixture, adaptive mesh refinement and ISAT are found to be efficient strategies to reduce computational cost with TFM-LES. |
| format | Article |
| id | doaj-art-75ffd6807f2f4133b5bf67596d06188f |
| institution | Kabale University |
| issn | 2590-1230 |
| language | English |
| publishDate | 2025-03-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Results in Engineering |
| spelling | doaj-art-75ffd6807f2f4133b5bf67596d06188f2025-01-27T04:22:11ZengElsevierResults in Engineering2590-12302025-03-0125104122Modeling flame acceleration in H2 turbulent combustion: Strategies to reduce computational costA. Dahmani0R.A. Otón-Martínez1F. Nicolás-Pérez2F.J.S. Velasco3O. de Francisco4Universidad Politécnica de Cartagena, Dep. Ingeniería Térmica y de Fluidos, Campus Muralla del Mar (30202) Cartagena, Spain; Corresponding author.Centro Universitario de la Defensa (CUD), Academia General del Aire. Cl. Coronel Lopez Peña s/n 30720, San Javier, SpainLynx Simulations S.L., Calle del Metal 4, 30009 Murcia, SpainUniversidad Politécnica de Cartagena, Dep. Ingeniería Térmica y de Fluidos, Campus Muralla del Mar (30202) Cartagena, SpainUniversidad Politécnica de Cartagena, Dep. Ingeniería Térmica y de Fluidos, Campus Muralla del Mar (30202) Cartagena, SpainReducing the computational cost of fluid dynamics simulations is one of the main challenges in many complex industrial flows’ problems. This challenge becomes more crucial in nuclear safety applications, such as the simulation of accident sequences in large volumes. The present study summarizes the investigations conducted to identify and assess reliable modeling strategies for reducing computational cost for the simulations of hydrogen turbulent combustion in nuclear accident scenarios which consider the flame acceleration, with a primary focus on the use of LES coupled with Artificially Thickened Flame Model (TFM) using a detailed chemical reaction mechanism. For this purpose, the LES-TFM model was benchmarked against experimental data of flame acceleration in a tube for lean mixtures. The obtained results show that LES-TFM model with a detailed 12-reaction chemical kinetics can predict flame acceleration. Moreover, the use of a dynamic grid refinement with an initial coarser mesh with LES-TFM is found to overestimate the time lapse of the initial low-velocity stage of the sequence. However, it permits to simulate the flame acceleration dynamics. Finally, using an effective Lewis of the mixture, adaptive mesh refinement and ISAT are found to be efficient strategies to reduce computational cost with TFM-LES.http://www.sciencedirect.com/science/article/pii/S2590123025002105Turbulent hydrogen combustionLarge eddy simulation (LES)Thickened flame model (TFM), Flame accelerationNuclear safety |
| spellingShingle | A. Dahmani R.A. Otón-Martínez F. Nicolás-Pérez F.J.S. Velasco O. de Francisco Modeling flame acceleration in H2 turbulent combustion: Strategies to reduce computational cost Results in Engineering Turbulent hydrogen combustion Large eddy simulation (LES) Thickened flame model (TFM), Flame acceleration Nuclear safety |
| title | Modeling flame acceleration in H2 turbulent combustion: Strategies to reduce computational cost |
| title_full | Modeling flame acceleration in H2 turbulent combustion: Strategies to reduce computational cost |
| title_fullStr | Modeling flame acceleration in H2 turbulent combustion: Strategies to reduce computational cost |
| title_full_unstemmed | Modeling flame acceleration in H2 turbulent combustion: Strategies to reduce computational cost |
| title_short | Modeling flame acceleration in H2 turbulent combustion: Strategies to reduce computational cost |
| title_sort | modeling flame acceleration in h2 turbulent combustion strategies to reduce computational cost |
| topic | Turbulent hydrogen combustion Large eddy simulation (LES) Thickened flame model (TFM), Flame acceleration Nuclear safety |
| url | http://www.sciencedirect.com/science/article/pii/S2590123025002105 |
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