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Elimination of fast modes in the coupled process of chemistry and diffusion in turbulent nonpremixed flames: an application of the REDIM approach

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Abstract
A computational study has been made of bluff-body stabilized turbulent jet flames with strong turbulence-chemistry interaction (Sydney Flames HM1 and HM3). The wide range of scales in the problem is described using a combination of a standard second moment turbulence closure, a joint scalar transported probability density function (PDF) method and the Reaction-Diffusion Manifold (REDIM) technique. The latter provides a reduction of a detailed chemistry mechanism, taking into account effects of laminar diffusion. In an a priori test it is evaluated to what extent the single shot experimental data are located on the reaction-diffusion manifold. Next, computed spatial profiles of mean and variance of independent and dependent scalar variables and profiles of conditional averages and variances (conditional on mixture fraction) are compared to the experimental results. The quality of these predictions is interpreted in relation to the a priori analysis. In general, simulations using the REDIM approach for reduction of detailed C2-chemistry confirm earlier findings for micro-mixing model behavior, obtained with a skeletal Cl-mechanism. Nevertheless it is concluded that the experiments show important features that are not described by the currently used REDIM.
Keywords
REDIM, PROBABILITY DENSITY-FUNCTION, MANIFOLDS, EQUATIONS, FIELDS, REACTIVE FLOWS, ALGORITHM, SCALAR PDF SIMULATIONS, BODY STABILIZED FLAME, nonpremixed, ILDM, turbulent combustion, dimension reduction, probability density function, invariant manifold

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Chicago
Roekaerts, Dirk, Bart Merci, Bertrand Naud, and Ullrich Maas. 2009. “Elimination of Fast Modes in the Coupled Process of Chemistry and Diffusion in Turbulent Nonpremixed Flames: An Application of the REDIM Approach.” International Journal for Multiscale Computational Engineering 7 (6): 487–508.
APA
Roekaerts, D., Merci, B., Naud, B., & Maas, U. (2009). Elimination of fast modes in the coupled process of chemistry and diffusion in turbulent nonpremixed flames: an application of the REDIM approach. INTERNATIONAL JOURNAL FOR MULTISCALE COMPUTATIONAL ENGINEERING, 7(6), 487–508. Presented at the Delft-Center-for-Computational-Science-and-Engineering Symposium.
Vancouver
1.
Roekaerts D, Merci B, Naud B, Maas U. Elimination of fast modes in the coupled process of chemistry and diffusion in turbulent nonpremixed flames: an application of the REDIM approach. INTERNATIONAL JOURNAL FOR MULTISCALE COMPUTATIONAL ENGINEERING. 2009;7(6):487–508.
MLA
Roekaerts, Dirk, Bart Merci, Bertrand Naud, et al. “Elimination of Fast Modes in the Coupled Process of Chemistry and Diffusion in Turbulent Nonpremixed Flames: An Application of the REDIM Approach.” INTERNATIONAL JOURNAL FOR MULTISCALE COMPUTATIONAL ENGINEERING 7.6 (2009): 487–508. Print.
@article{814225,
  abstract     = {A computational study has been made of bluff-body stabilized turbulent jet flames with strong turbulence-chemistry interaction (Sydney Flames HM1 and HM3). The wide range of scales in the problem is described using a combination of a standard second moment turbulence closure, a joint scalar transported probability density function (PDF) method and the Reaction-Diffusion Manifold (REDIM) technique. The latter provides a reduction of a detailed chemistry mechanism, taking into account effects of laminar diffusion. In an a priori test it is evaluated to what extent the single shot experimental data are located on the reaction-diffusion manifold. Next, computed spatial profiles of mean and variance of independent and dependent scalar variables and profiles of conditional averages and variances (conditional on mixture fraction) are compared to the experimental results. The quality of these predictions is interpreted in relation to the a priori analysis. In general, simulations using the REDIM approach for reduction of detailed C2-chemistry confirm earlier findings for micro-mixing model behavior, obtained with a skeletal Cl-mechanism. Nevertheless it is concluded that the experiments show important features that are not described by the currently used REDIM.},
  author       = {Roekaerts, Dirk and Merci, Bart and Naud, Bertrand and Maas, Ullrich},
  issn         = {1543-1649},
  journal      = {INTERNATIONAL JOURNAL FOR MULTISCALE COMPUTATIONAL ENGINEERING},
  keyword      = {REDIM,PROBABILITY DENSITY-FUNCTION,MANIFOLDS,EQUATIONS,FIELDS,REACTIVE FLOWS,ALGORITHM,SCALAR PDF SIMULATIONS,BODY STABILIZED FLAME,nonpremixed,ILDM,turbulent combustion,dimension reduction,probability density function,invariant manifold},
  language     = {eng},
  location     = {Delft, The Netherlands},
  number       = {6},
  pages        = {487--508},
  title        = {Elimination of fast modes in the coupled process of chemistry and diffusion in turbulent nonpremixed flames: an application of the REDIM approach},
  url          = {http://dx.doi.org/10.1615/IntJMultCompEng.v7.i6},
  volume       = {7},
  year         = {2009},
}

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