A simple post-processing method to correct species predictions in artificially thickened turbulent flames

Gruhlke, Pascal; Inanc, E.; Mercier, Renaud; Fiorina, Benoît

doi:10.1016/j.proci.2020.06.215

Cited by 12 publications

(3 citation statements)

References 29 publications

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“…Other LES of the Cambridge burner, made with unstructured FV meshes refined only in the flame region, were also considered (Mercier al. 2015, Gruhlke et al 2021 and had a number of DOF between 6 × 10 6 to 17 × 10 6 for a minimum ∆ x value of 0.25 mm. Therefore, the discretizations employed in this work are also in this range of DOF values.…”

Section: Results Analysismentioning

confidence: 99%

Extension of the Spectral Difference Method to Premixed Laminar and Turbulent Combustion

Marchal

Deniau

Boussuge

et al. 2023

Flow Turbulence Combust

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A Spectral Difference (SD) algorithm on tensor-product elements which solves the reacting compressible Navier-Stokes equations is presented. The classical SD algorithm is shown to be unstable when a multi-species gas where thermodynamic properties depend on temperature and species mass fractions is considered. It is demonstrated that computing primitive variables from conservative variables at solution points and extrapolating them at flux points, rather than conservative variables, make the SD method stable for such case. In addition, a new methodology, more stable, for computing the diffusive fluxes at an interface is detailed. To allow the simulation of combustion, characteristic and wall boundary conditions for multi-species flows in the SD framework are introduced and the thickened flame turbulent combustion model is adapted to the SD context. Validation test cases from one-dimensional and two-dimensional Flow, Turbulence and Combustion laminar flames to a three-dimensional turbulent flame have been performed showing excellent agreement with each of the reference solutions. To the authors' knowledge, this is the first time that a 3D turbulent flame is simulated using the SD method. The interest of employing a high-order method, such as the SD, in combustion is demonstrated: high values of the polynomial degree improve the quality of the results which advocates for the use of p-refinement when simulating reacting flows.

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Section: Results Analysismentioning

confidence: 99%

Extension of the Spectral Difference Method to Premixed Laminar and Turbulent Combustion

Marchal

Deniau

Boussuge

et al. 2023

Flow Turbulence Combust

Self Cite

View full text Add to dashboard Cite

show abstract

“…This might affect the strength of the recirculation -although a significant change has not been observed as a result of grid refinement. For the swirled cases (not considered here), it is also known that a very long computational domain is required to obtain an accurate prediction of the recirculation zone [76]. The agreement gets better towards downstream locations, as the heat loss effects become insignificant.…”

Section: Resultsmentioning

confidence: 99%

Scalar gradient and flame propagation statistics of a flame-resolved laboratory-scale turbulent stratified burner simulation

Inanc

Chakraborty

2022

Combustion and Flame

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“…This high difference is due to the use of equidistant orthogonal cartesian grids in the LES of Proch and Kempf whereas in this work the mesh is refined only in the flame region. Other LES of the Cambridge burner, made with unstructured FV meshes refined only in the flame region, were also considered [182,310] and had a number of DOF between 6 × 10 6 to 17 × 10 6 for a minimum ∆ x value of 0.25 mm. Therefore, the discretizations employed in this work are also in this range of DOF values.…”

Section: Results Analysis On Case Swb1mentioning

confidence: 99%

Extension of the Spectral Difference Method to Combustion

Marchal

Deniau²,

Boussuge³

et al. 2021

SSRN Journal

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A simple post-processing method to correct species predictions in artificially thickened turbulent flames

Cited by 12 publications

References 29 publications

Extension of the Spectral Difference Method to Premixed Laminar and Turbulent Combustion

Extension of the Spectral Difference Method to Premixed Laminar and Turbulent Combustion

Scalar gradient and flame propagation statistics of a flame-resolved laboratory-scale turbulent stratified burner simulation

Extension of the Spectral Difference Method to Combustion

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