000134909 001__ 134909
000134909 005__ 20250923084421.0
000134909 0247_ $$2doi$$a10.1007/s10494-023-00494-3
000134909 0248_ $$2sideral$$a138414
000134909 037__ $$aART-2024-138414
000134909 041__ $$aeng
000134909 100__ $$aChakraborty, Nilanjan
000134909 245__ $$aEvolution of flame displacement speed within flame front in different regimes of premixed turbulent combustion
000134909 260__ $$c2024
000134909 5060_ $$aAccess copy available to the general public$$fUnrestricted
000134909 5203_ $$aA transport equation for the flame displacement speed evolution in premixed flames is derived from first principles, and the mean behaviours of the terms of this equation are analysed based on a Direct Numerical Simulation database of statistically planar turbulent premixed flames with a range of different Karlovitz numbers. It is found that the regime of combustion (or Karlovitz number) affects the statistical behaviour of the mean contributions of the terms of the displacement speed transport equation which are associated with the normal strain rate and curvature dependence of displacement speed. The contributions arising from molecular diffusion and flame curvature play leading order roles in all combustion regimes, whereas the terms arising from the flame normal straining and reactive scalar gradient become leading order contributors only for the flames with high Karlovitz number values representing the thin reaction zones regime. The mean behaviours of the terms of the displacement speed transport equation indicate that the effects arising from fluid-dynamic normal straining, reactive scalar gradient and flame curvature play key roles in the evolution of displacement speed. The mean characteristics of the various terms of the displacement speed transport equation are explained in detail and their qualitative behaviours can be expounded based on the behaviours of the corresponding terms in the case of 1D steady laminar premixed flames. This implies that the flamelet assumption has the potential to be utilised for the purpose of any future modelling of the unclosed terms of the displacement speed transport equation even in the thin reaction zones regime for moderate values of Karlovitz number.
000134909 540__ $$9info:eu-repo/semantics/openAccess$$aby$$uhttp://creativecommons.org/licenses/by/3.0/es/
000134909 590__ $$a2.4$$b2024
000134909 592__ $$a0.6$$b2024
000134909 591__ $$aTHERMODYNAMICS$$b32 / 79 = 0.405$$c2024$$dQ2$$eT2
000134909 593__ $$aChemical Engineering (miscellaneous)$$c2024$$dQ2
000134909 591__ $$aMECHANICS$$b79 / 171 = 0.462$$c2024$$dQ2$$eT2
000134909 593__ $$aPhysics and Astronomy (miscellaneous)$$c2024$$dQ2
000134909 593__ $$aPhysical and Theoretical Chemistry$$c2024$$dQ2
000134909 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/publishedVersion
000134909 700__ $$0(orcid)0000-0002-2267-8598$$aDopazo, Cesar$$uUniversidad de Zaragoza
000134909 700__ $$aDunn, Harry
000134909 700__ $$aAhmed, Umair
000134909 7102_ $$15001$$2600$$aUniversidad de Zaragoza$$bDpto. Ciencia Tecnol.Mater.Fl.$$cÁrea Mecánica de Fluidos
000134909 773__ $$g112, 3 (2024), 793-809$$pFlow turbul. combust.$$tFlow, Turbulence and Combustion$$x1386-6184
000134909 8564_ $$s2002544$$uhttps://zaguan.unizar.es/record/134909/files/texto_completo.pdf$$yVersión publicada
000134909 8564_ $$s1671229$$uhttps://zaguan.unizar.es/record/134909/files/texto_completo.jpg?subformat=icon$$xicon$$yVersión publicada
000134909 909CO $$ooai:zaguan.unizar.es:134909$$particulos$$pdriver
000134909 951__ $$a2025-09-22-14:36:21
000134909 980__ $$aARTICLE