Effects of the Local Flow Topologies Upon the Structure of a Premixed Methane-air Turbulent Jet Flame

Cifuentes, L. ; Dopazo, C. (Universidad de Zaragoza) ; Martin, J. (Universidad de Zaragoza) ; Domingo, P. ; Vervisch, L.

Resumen: Local flow topologies have been identified and their interactions with the iso-scalar surfaces geometries have been investigated using the results of a three-dimensional direct numerical simulation (DNS) of a turbulent premixed methane-air flame in a piloted Bunsen burner configuration with tabulated chemistry. The universal teardrop shape of the joint probability density function (jpdf) of the second and third invariants of the velocity-gradient tensor disappears in the different flame regions under study. A ‘canonical’ vortex, which affects the fine-scale structure of the turbulent premixed flame, has been identified and analyzed at three times, differing by increments of the order of the Kolmogorov time micro-scale.

Idioma: Inglés

DOI: 10.1007/s10494-015-9686-1

Año: 2016

Publicado en: Flow, Turbulence and Combustion 96 (2016), 535–546
ISSN: 1386-6184

Factor impacto JCR: 1.775 (2016)

Categ. JCR: THERMODYNAMICS rank: 24 / 58 = 0.414 (2016) - Q2 - T2
Categ. JCR: MECHANICS rank: 57 / 133 = 0.429 (2016) - Q2 - T2

Factor impacto SCIMAGO: 0.731 - Chemical Engineering (miscellaneous) (Q1) - Physics and Astronomy (miscellaneous) (Q2) - Physical and Theoretical Chemistry (Q2)

Tipo y forma: Article (Published version)

Área (Departamento): Área Mecánica de Fluidos (Dpto. Ciencia Tecnol.Mater.Fl.)