Influence of thermal wall boundary condition on scalar statistics during flame-wall interaction of premixed combustion in turbulent boundary layers

The influence of thermal wall boundary conditions on the behaviour scalar statistics during flame-wall interaction (FWI) premixed flames within turbulent layers has been investigated. Three-dimensional direct numerical simulations (DNS) two different flow configurations for interacting with chemically inert isothermal as well adiabatic walls in fully developed have performed. first configuration is an oblique (OWI) a V-flame channel and second representative head-on (HOI) planar flame layer. turbulence non-reacting these friction velocity based Reynolds number Re?=110 while combustion characteristics are stoichiometric methane–air mixture under atmospheric conditions. Differences mean behaviours progress variable non-dimensional temperature observed response to Mean variance their respective dissipation rates investigated it found that variances remain coupled case walls, significant differences exist between quantities vicinity both configurations. FWI decrease towards conditions, but higher rate when compared variable. fluxes suggest can show gradient countergradient type depending also proximity wall. In OWI, choice condition fluxes, whereas layer HOI, no