Difference between revisions of "SiTCom-B Gallery"
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* C. Merlin, P. Domingo, L. Vervisch Large Eddy Simulation of turbulent flames in a Trapped Vortex Combustor (TVC) - A flamelet presumed-pdf closure preserving laminar flame speed, Comptes Rendus Mecanique, Out of Equilibrium Dynamics issue, in press. | * C. Merlin, P. Domingo, L. Vervisch Large Eddy Simulation of turbulent flames in a Trapped Vortex Combustor (TVC) - A flamelet presumed-pdf closure preserving laminar flame speed, Comptes Rendus Mecanique, Out of Equilibrium Dynamics issue, in press. | ||
+ | |||
+ | == DNS of a Rapid Compression Machine == | ||
+ | |||
+ | {| class="wikitable" | ||
+ | |+ Analysis of ignition regimes after rapid compression - Homogeneous mixture stratified in temperature | ||
+ | |- | ||
+ | | [[File:RCM1.png|center|400px]] | ||
+ | | [[File:RCM2.png|center|400px]] | ||
+ | | [[File:RCM3.png|center|400px]] | ||
+ | |- | ||
+ | | Flow injection sequence | ||
+ | | Ignition patterns | ||
+ | | Regime Diagram | ||
+ | |} | ||
+ | |||
+ | * G. Lodier, C. Merlin, P. Domingo, L. Vervisch, F. Ravet (2012) Self-ignition scenarios after rapid compression of a turbulent mixture weakly-stratified in temperature, Combust. Flame 159(11): 3358-3371. | ||
== DNS of a non-reacting HIT == | == DNS of a non-reacting HIT == |
Revision as of 10:04, 6 November 2012
Contents
- 1 LES of a Trapped Vortex Combustor
- 2 DNS of a Rapid Compression Machine
- 3 DNS of a non-reacting HIT
- 4 DNS of a non-reacting supercritical mixing layer
- 5 Flame base stabilization in vitiated partially-premixed mixture
- 6 Electric field and edge-flame
- 7 NSCBC vs 3D-NSCBC in jets
- 8 Impinging round jets
- 9 Ignition of a bluff-body burner
- 10 Bunsen flame
- 11 Jet flame-surface
- 12 Nonpremixed jet flame
LES of a Trapped Vortex Combustor
Geometry of the Trapped Vortex Combustion chamber | Q-critrion - Visualisation of the turbulent flow topology | Comparison against experiments |
- C. Merlin, P. Domingo, L. Vervisch Large Eddy Simulation of turbulent flames in a Trapped Vortex Combustor (TVC) - A flamelet presumed-pdf closure preserving laminar flame speed, Comptes Rendus Mecanique, Out of Equilibrium Dynamics issue, in press.
DNS of a Rapid Compression Machine
Flow injection sequence | Ignition patterns | Regime Diagram |
- G. Lodier, C. Merlin, P. Domingo, L. Vervisch, F. Ravet (2012) Self-ignition scenarios after rapid compression of a turbulent mixture weakly-stratified in temperature, Combust. Flame 159(11): 3358-3371.
DNS of a non-reacting HIT
This is a very simple DNS computation of a HIT with a constant-properties gas.
The main parameters of the simulation are:
- temporal integration: RK3,
- spatial scheme: 4th order skew symmetric
- no AV.
In this series of computations, the number of cell is increased from 64^3 to 256^3.
DNS of a non-reacting supercritical mixing layer
This simulation is a DNS of a HIT non-reacting supercritical mixing layer with real-gas properties (equation of state, thermodynamic laws and transport laws).
The main parameters of the simulation are:
- temporal integration: RK3,
- spatial scheme: 4th order skew symmetric
- 2D / Periodic in all directions
- 3.2 Million cells
- EOS: Soave-Redlich-Kwong.
- Transport laws: Chung et al.
The fields that are displayed are:
- up : the density which varies from 80 kg/m3 in the cold stream to 800 kg/m3 in the hot stream.
- down : the mixness ratio which varies from 0 in pure constitutents to 1 for perfect mixness.
Media:supercritical_mixing_layer_mix.avi
This video shows the temporal evolution of mixness ratio during the simulation.
Warning:
- no Artificial Viscosity was used and the mesh was slightly too coarse: a few "wiggles" are visible from time to time near the steepest gradients...
- this video is best visualized with VLC.
Flame base stabilization in vitiated partially-premixed mixture
- P. Domingo, L. Vervisch, D. Veynante (2008) Large-Eddy Simulation of a lifted methane jet flame in a vitiated coflow Combust. Flame 152(3): 415-432.
Electric field and edge-flame
- M. Belhi, P. Domingo, P. Vervisch (2010) Direct numerical simulation of the effect of an electric field on flame stability Combust. Flame 157 2286–2297.
NSCBC vs 3D-NSCBC in jets
- G. Lodato, P. Domingo, L. Vervisch (2008) Three-dimensional boundary conditions for Direct and Large-Eddy Simulation of compressible flows J. of Comp. Phys. 227(10): 5105-5143.
Impinging round jets
- G. Lodato, L. Vervisch, P. Domingo (2009) A compressible wall-adapting similarity mixed model for large-eddy simulation of the impinging round jet Phys. Fluids 21:035102.
Ignition of a bluff-body burner
- V. Subramanian, P. Domingo, L. Vervisch (2010) Large-Eddy Simulation of forced ignition of an annular bluff-body burner Combust. Flame 157(3): 579-601.
Bunsen flame
- G. Lodato, P. Domingo, L. Vervisch, D. Veynante (2009) Scalar variances: LES against measurements and mesh optimization criterion; scalar gradient: a three-dimensional estimation from planar measurements using DNS In Studying turbulence by using numerical simulation databases XII, (Eds Center for Turbulence Research) Stanford, pp. 387-398
Jet flame-surface
- L. Vervisch, P. Domingo, G. Lodato, D. Veynante (2010) Scalar energy fluctuations in Large-Eddy Simulation of turbulent flames: Statistical budgets and mesh quality criterion Combust. Flame 157(4): 778-789.
- D. Veynante, G. Lodato, P. Domingo, L. Vervisch, E. R. Hawkes (2010) Estimation of three-dimensional flame surface densities from planar images in turbulent premixed combustion Exp. in Fluids 49:267-278.
Nonpremixed jet flame
- G. Godel, P. Domingo, L. Vervisch (2009) Tabulation of NOx chemistry for Large-Eddy Simulation of non-premixed turbulent flames Proc. Combust. Inst. 32: 1555-1551.