Soret and Dilution Effects on Premixed Flames

García‐Ybarra, P.L.; Nicoli, Colette; Clavin, Paul

doi:10.1080/00102208408960370

Cited by 81 publications

(23 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…More generally, recent numerical investigations have brought further support for the importance of accurate transport property in various multicomponent reactive flows calculations [47,48,49,50,51,52,53].…”

Section: So That the Two-temperature Entropy Governing Equation Finalmentioning

confidence: 99%

Relaxation of internal temperature and volume viscosity

Bruno

Giovangigli

2011

Physics of Fluids

View full text Add to dashboard Cite

We investigate the relaxation of internal temperature and the concept of volume viscosity in nonequilibrium gas models derived from the kinetic theory. We first investigate a nonequilibrium gas model with two temperatures-translational and internal-where the volume viscosity is absent. We establish that, in a relaxation regime, the temperature difference becomes proportional to the divergence of the velocity fields and define a nonequilibrium, multitemperature, volume viscosity coefficient. We next analyze the convergence of the two temperature model towards the one temperature model when the relaxation is fast. We then investigate a nonequilibrium two temperature gas model with a fast and a slow internal energy mode. We establish that, in a relaxation regime, there are four contributions to the volume viscosity, namely the fast internal mode volume viscosity, the slow internal mode volume viscosity, the relaxation pressure and the perturbed source term. In the thermodynamic equilibrium limit, the sum of these four terms converges toward the one-temperature two-mode volume viscosity. We finally perform Monte Carlo simulations of spontaneous fluctuations near thermodynamic equilibrium. The numerical results obtained from the Boltzmann equation are compared to the predictions of the one and two temperature fluid models and the agreement between theory and calculations is complete.

show abstract

Section: So That the Two-temperature Entropy Governing Equation Finalmentioning

confidence: 99%

Relaxation of internal temperature and volume viscosity

Bruno

Giovangigli

2011

Physics of Fluids

View full text Add to dashboard Cite

show abstract

“…However, there are only a few theoretical studies on Soret effects in the literature. Garcia-Ybarra et al [22,23] the influence of Soret diffusion on counterflow diffusion flames. Fong et al [25] examined the Soret diffusion effects on laminar diffusion flame in high density fluids.…”

Section: Introductionmentioning

confidence: 99%

Effects of Soret diffusion on spherical flame initiation and propagation

Han

Chen

2015

International Journal of Heat and Mass Transfer

View full text Add to dashboard Cite

“…At downstream lateral boundaries, the boundary condition is such that d dt = 0 and at all other boundaries, free stream conditions are used. The analysis of Garcia-Ybarra et al [9] yielded the result that the Markstein length scale L is 2-6 times the laminar flame thickness for ethylene flames. In this paper, L is chosen to be of the same order of magnitude as dx, i.e.…”

Section: Weno Methods For Front Propagation and Level Set Re-initializmentioning

confidence: 98%

Flame Surface Density in Turbulent Premixed V-Flame with Buoyancy

Chan

Li²

2005

Flow Turbulence Combust

View full text Add to dashboard Cite

A fractional step numerical model is established for turbulent premixed combustion with buoyancy. The flame front propagation is described by the level-set method. Simulated results without buoyancy have been previously validated with available experimental data on a premixed V-flame. A new formula is presented to fit the flame surface density with respect to the reaction progress variable in a turbulent premixed V-flame. By numerical simulations, dynamical behaviour of the flame under the interaction of turbulence, exothermicity and buoyancy are investigated. NomenclatureA = area of vortex blob or flame zone area b = buoyancy force c = reaction progress variable D = finite difference operator f = source strength H = Hamiltonian l = length of flame segment L = Markstein length scale m = strength of volume source n = number of samples r = radius of vortex blob S = flame speed U, V = velocity components x, y = streamwise and transverse directions Greek symbols α = volume expansion factor = circulation 274 C.K. CHAN AND X.-G LI δ = flame brush thickness κ = curvature of the flame front ω = vorticity φ = velocity potential ϕ = parameter in the re-initialization equation σ = ratio of burning rates = computational cell = parameter in level set equation ψ = stream function τ = non-dimensional time Subscripts u = unburnt region b = burnt region f = flame front L = laminar t = tangential n = normal +, − = forward and backward difference

show abstract

Soret and Dilution Effects on Premixed Flames

Cited by 81 publications

References 15 publications

Relaxation of internal temperature and volume viscosity

Relaxation of internal temperature and volume viscosity

Effects of Soret diffusion on spherical flame initiation and propagation

Flame Surface Density in Turbulent Premixed V-Flame with Buoyancy

Contact Info

Product

Resources

About