Mixing time-history effects in Large Eddy Simulation of non-premixed turbulent flames: Flow-Controlled Chemistry Tabulation

2012 ◽  
Vol 159 (1) ◽  
pp. 336-352 ◽  
Author(s):  
N. Enjalbert ◽  
P. Domingo ◽  
L. Vervisch
Keyword(s):  
Large Eddy Simulation ◽  
Mixing Time ◽  
Time History ◽  
Turbulent Flames ◽  
Eddy Simulation ◽  
History Effects ◽  
Premixed Turbulent Flames ◽  
Large Eddy ◽  
Chemistry Tabulation

Large-eddy Simulation of Triangular-stabilized Lean Premixed Turbulent Flames: Quality and Error Assessment

2012 ◽  
Vol 88 (4) ◽  
pp. 563-596 ◽  
Author(s):  
Bhuvaneswaran Manickam ◽  
Joerg Franke ◽  
Siva P. R. Muppala ◽  
Friedrich Dinkelacker
Keyword(s):  
Large Eddy Simulation ◽  
Turbulent Flames ◽  
Error Assessment ◽  
Eddy Simulation ◽  
Premixed Turbulent Flames ◽  
Large Eddy ◽  
Lean Premixed

Scalar Mixing Study at High-Schmidt Regime in a Turbulent Jet Flow Using Large-Eddy Simulation/Filtered Density Function Approach

2015 ◽  
Vol 138 (2) ◽  
Author(s):  
Juan M. Mejía ◽  
Farid Chejne ◽  
Alejandro Molina ◽  
Amsini Sadiki
Keyword(s):  
Large Eddy Simulation ◽  
Density Function ◽  
Mixing Time ◽  
Passive Scalar ◽  
Low Velocity ◽  
Splitting Algorithm ◽  
Water Stream ◽  
Filtered Density Function ◽  
Eddy Simulation ◽  
Large Eddy

Mixing of a passive scalar in a high-Schmidt turbulent round jet was studied using large-eddy simulation (LES) coupled to filtered density function (FDF). This coupled approach enabled the solution of the continuity, momentum, and scalar (concentration) transport equations when studying mixing in a confined turbulent liquid jet discharging a conserved scalar (rhodamine B) into a low-velocity water stream. The Monte Carlo method was used for solving the FDF transport equation and controlling the number of particles per cell (NPC) using a clustering and splitting algorithm. A sensibility analysis of the number of stochastic particles per cell as well as the influence of the subgrid-scale (SGS) mixing time constant were evaluated. The comparison of simulation results with experiments showed that LES/FDF satisfactorily reproduced the behavior observed in this flow configuration. At high radial distances, the developed superviscous layer generates an intermittency phenomenon leading to a complex, anisotropic behavior of the scalar field, which is difficult to simulate with the conventional and advanced SGS models required by LES. This work showed a close agreement with reported experimental data at this superviscous layer following the FDF approach.

Large eddy simulation and experiments of stratified lean premixed methane/air turbulent flames

2007 ◽  
Vol 31 (1) ◽  
pp. 1467-1475 ◽  
Author(s):  
K.-J. Nogenmyr ◽  
P. Petersson ◽  
X.S. Bai ◽  
A. Nauert ◽  
J. Olofsson ◽  
...  
Keyword(s):  
Large Eddy Simulation ◽  
Turbulent Flames ◽  
Eddy Simulation ◽  
Large Eddy ◽  
Lean Premixed
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