Numerical Prediction of Turbulent Spray Flame Characteristics Using the Filtered Eulerian Stochastic Field Approach Coupled to Tabulated Chemistry
The Eulerian stochastic fields (ESF) method, which is based on the transport equation of the joint subgrid scalar probability density function, is applied to Large Eddy Simulation of a turbulent dilute spray flame. The approach is coupled with a tabulated chemistry approach to represent the subgrid...
| Main Authors: | , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2021-01-01
|
| Series: | Fluids |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2311-5521/6/2/50 |
| _version_ | 1797408189494329344 |
|---|---|
| author | Louis Dressler Fernando Luiz Sacomano Filho Florian Ries Hendrik Nicolai Johannes Janicka Amsini Sadiki |
| author_facet | Louis Dressler Fernando Luiz Sacomano Filho Florian Ries Hendrik Nicolai Johannes Janicka Amsini Sadiki |
| author_sort | Louis Dressler |
| collection | DOAJ |
| description | The Eulerian stochastic fields (ESF) method, which is based on the transport equation of the joint subgrid scalar probability density function, is applied to Large Eddy Simulation of a turbulent dilute spray flame. The approach is coupled with a tabulated chemistry approach to represent the subgrid turbulence–chemistry interaction. Following a two-way coupled Eulerian–Lagrangian procedure, the spray is treated as a multitude of computational parcels described in a Lagrangian manner, each representing a heap of real spray droplets. The present contribution has two objectives: First, the predictive capabilities of the modeling framework are evaluated by comparing simulation results using 8, 16, and 32 stochastic fields with available experimental data. At the same time, the results are compared to previous studies, where the artificially thickened flame (ATF) model was applied to the investigated configuration. The results suggest that the ESF method can reproduce the experimental measurements reasonably well. Comparisons with the ATF approach indicate that the ESF results better describe the flame entrainment into the cold spray core of the flame. Secondly, the dynamics of the subgrid scalar contributions are investigated and the reconstructed probability density distributions are compared to common presumed shapes qualitatively and quantitatively in the context of spray combustion. It is demonstrated that the ESF method can be a valuable tool to evaluate approaches relying on a pre-integration of the thermochemical lookup-table. |
| first_indexed | 2024-03-09T03:55:48Z |
| format | Article |
| id | doaj.art-a27a4ff1495443298e945d0da4dfdb64 |
| institution | Directory Open Access Journal |
| issn | 2311-5521 |
| language | English |
| last_indexed | 2024-03-09T03:55:48Z |
| publishDate | 2021-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Fluids |
| spelling | doaj.art-a27a4ff1495443298e945d0da4dfdb642023-12-03T14:22:04ZengMDPI AGFluids2311-55212021-01-01625010.3390/fluids6020050Numerical Prediction of Turbulent Spray Flame Characteristics Using the Filtered Eulerian Stochastic Field Approach Coupled to Tabulated ChemistryLouis Dressler0Fernando Luiz Sacomano Filho1Florian Ries2Hendrik Nicolai3Johannes Janicka4Amsini Sadiki5Institute of Reactive Flows and Diagnostics, Technical University of Darmstadt, 64287 Darmstadt, GermanyLaboratory of Environmental and Thermal Engineering, University of São Paulo, São Paulo 05508-030, BrazilInstitute of Reactive Flows and Diagnostics, Technical University of Darmstadt, 64287 Darmstadt, GermanyInstitute of Reactive Flows and Diagnostics, Technical University of Darmstadt, 64287 Darmstadt, GermanyInstitute of Reactive Flows and Diagnostics, Technical University of Darmstadt, 64287 Darmstadt, GermanyInstitute of Reactive Flows and Diagnostics, Technical University of Darmstadt, 64287 Darmstadt, GermanyThe Eulerian stochastic fields (ESF) method, which is based on the transport equation of the joint subgrid scalar probability density function, is applied to Large Eddy Simulation of a turbulent dilute spray flame. The approach is coupled with a tabulated chemistry approach to represent the subgrid turbulence–chemistry interaction. Following a two-way coupled Eulerian–Lagrangian procedure, the spray is treated as a multitude of computational parcels described in a Lagrangian manner, each representing a heap of real spray droplets. The present contribution has two objectives: First, the predictive capabilities of the modeling framework are evaluated by comparing simulation results using 8, 16, and 32 stochastic fields with available experimental data. At the same time, the results are compared to previous studies, where the artificially thickened flame (ATF) model was applied to the investigated configuration. The results suggest that the ESF method can reproduce the experimental measurements reasonably well. Comparisons with the ATF approach indicate that the ESF results better describe the flame entrainment into the cold spray core of the flame. Secondly, the dynamics of the subgrid scalar contributions are investigated and the reconstructed probability density distributions are compared to common presumed shapes qualitatively and quantitatively in the context of spray combustion. It is demonstrated that the ESF method can be a valuable tool to evaluate approaches relying on a pre-integration of the thermochemical lookup-table.https://www.mdpi.com/2311-5521/6/2/50LESspray combustionEulerian stochastic fieldsartificially thickened flameEuler–LagrangeOpenFOAM |
| spellingShingle | Louis Dressler Fernando Luiz Sacomano Filho Florian Ries Hendrik Nicolai Johannes Janicka Amsini Sadiki Numerical Prediction of Turbulent Spray Flame Characteristics Using the Filtered Eulerian Stochastic Field Approach Coupled to Tabulated Chemistry Fluids LES spray combustion Eulerian stochastic fields artificially thickened flame Euler–Lagrange OpenFOAM |
| title | Numerical Prediction of Turbulent Spray Flame Characteristics Using the Filtered Eulerian Stochastic Field Approach Coupled to Tabulated Chemistry |
| title_full | Numerical Prediction of Turbulent Spray Flame Characteristics Using the Filtered Eulerian Stochastic Field Approach Coupled to Tabulated Chemistry |
| title_fullStr | Numerical Prediction of Turbulent Spray Flame Characteristics Using the Filtered Eulerian Stochastic Field Approach Coupled to Tabulated Chemistry |
| title_full_unstemmed | Numerical Prediction of Turbulent Spray Flame Characteristics Using the Filtered Eulerian Stochastic Field Approach Coupled to Tabulated Chemistry |
| title_short | Numerical Prediction of Turbulent Spray Flame Characteristics Using the Filtered Eulerian Stochastic Field Approach Coupled to Tabulated Chemistry |
| title_sort | numerical prediction of turbulent spray flame characteristics using the filtered eulerian stochastic field approach coupled to tabulated chemistry |
| topic | LES spray combustion Eulerian stochastic fields artificially thickened flame Euler–Lagrange OpenFOAM |
| url | https://www.mdpi.com/2311-5521/6/2/50 |
| work_keys_str_mv | AT louisdressler numericalpredictionofturbulentsprayflamecharacteristicsusingthefilteredeulerianstochasticfieldapproachcoupledtotabulatedchemistry AT fernandoluizsacomanofilho numericalpredictionofturbulentsprayflamecharacteristicsusingthefilteredeulerianstochasticfieldapproachcoupledtotabulatedchemistry AT florianries numericalpredictionofturbulentsprayflamecharacteristicsusingthefilteredeulerianstochasticfieldapproachcoupledtotabulatedchemistry AT hendriknicolai numericalpredictionofturbulentsprayflamecharacteristicsusingthefilteredeulerianstochasticfieldapproachcoupledtotabulatedchemistry AT johannesjanicka numericalpredictionofturbulentsprayflamecharacteristicsusingthefilteredeulerianstochasticfieldapproachcoupledtotabulatedchemistry AT amsinisadiki numericalpredictionofturbulentsprayflamecharacteristicsusingthefilteredeulerianstochasticfieldapproachcoupledtotabulatedchemistry |