Numerical Study of the Radiative and Turbulent Heat Flux Behavior of Upward Flame Spread Over PMMA

Study on the role of soot and heat fluxes in upward flame spread using a wall-resolved large eddy simulation approach

“…The previous experiments did not provide sufficient soot data. Thus, soot is not generally taken into account or not validated even though the soot concentration influences radiation calculation [8][9][10][11][12]21]. Figure 12 shows the total and individual heat fluxes and fractions of individual components for large-scale full wall fire scenario.…”

“…They made predictions for total as well as incident radiative and convective heat fluxes but provided only comparison with experimental data and detailed discussion for total heat flux. Karpov et al [9] performed a 2-D numerical analysis of flame spread along a PMMA slab using large eddy simulation (LES) techniques with solid-phase pyrolysis modelling to investigate radiative and convective heat fluxes. They reported pulsating heat flux in the transition area between laminar and turbulent flame.…”

“…The present study mostly deals with (i) analysing the specific individual heat flux components and (ii) the influence of soot on flame spreading, as well as (iii) considering finite rate chemistry in flame spread modelling and reporting its effect on the predictions. Several experimental and numerical studies analysed relative magnitudes of the total, convective, and radiative heat fluxes and the influences of those [3,9] for flame spreading scenarios. Despite the above progress, none of the previous studies respectively evaluated radiative heat fluxes due to combustion gas and soot, or which insight is still lacking despite their significance as driving force.…”

Analysis of a numerical method for studying upward flame spread over solid material

“…В работе используется методология Фавра для описания пульсационного течения [Warnatz et al, 2006]. Математическая модель представлена ниже (например, [Karpov et al, 2016]).…”