Recent developments in DNS of turbulent combustion

P Domingo, L Vervisch - Proceedings of the Combustion Institute, 2023 - Elsevier
The simulation of turbulent flames fully resolving the smallest flow scales and the thinnest
reaction zones goes along with specific requirements, which are discussed from …

Influence of thermal expansion on fluid dynamics of turbulent premixed combustion and its modelling implications

N Chakraborty - Flow, Turbulence and Combustion, 2021 - Springer
The purpose of this paper is to demonstrate the effects of thermal expansion, as a result of
heat release arising from exothermic chemical reactions, on the underlying turbulent fluid …

A comparison between head-on quenching of stoichiometric methane-air and hydrogen-air premixed flames using Direct Numerical Simulations

J Lai, U Ahmed, M Klein, N Chakraborty - … Journal of Heat and Fluid Flow, 2022 - Elsevier
Head-on quenching of statistically planar stoichiometric methane-air and hydrogen-air
flames has been compared based on a Direct Numerical Simulation (DNS) database. Due …

Scalar gradient and strain rate statistics in oblique premixed flame–wall interaction within turbulent channel flows

U Ahmed, N Chakraborty, M Klein - Flow, Turbulence and Combustion, 2021 - Springer
Three-dimensional direct numerical simulations of V-flames interacting with chemically inert
walls in a fully developed turbulent channel flow have been performed under adiabatic and …

[HTML][HTML] Enstrophy evolution during head-on wall interaction of premixed flames within turbulent boundary layers

SK Ghai, N Chakraborty, U Ahmed, M Klein - Physics of Fluids, 2022 - pubs.aip.org
The statistical behaviors of mean enstrophy and its evolution during head-on interaction of
premixed flames propagating toward a chemically inert flat wall across the turbulent …

Analysis of the flame–wall interaction in premixed turbulent combustion

P Zhao, L Wang, N Chakraborty - Journal of Fluid Mechanics, 2018 - cambridge.org
The present work focuses on the flame–wall interaction (FWI) based on direct numerical
simulations (DNS) of a head-on premixed flame quenching configuration at the statistically …

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

U Ahmed, N Chakraborty, M Klein - International Journal of Heat and Fluid …, 2021 - Elsevier
The influence of thermal wall boundary conditions on the behaviour of scalar statistics
during flame-wall interaction (FWI) of premixed flames within turbulent boundary layers has …

Insights into the bending effect in premixed turbulent combustion using the flame surface density transport

U Ahmed, N Chakraborty, M Klein - Combustion Science and …, 2019 - Taylor & Francis
The bending effect of turbulent flame speed variation (ie, the deviation from the linear
increase of flame speed with increasing root-mean-square turbulent velocity fluctuation) has …

Effects of turbulent length scale on the bending effect of turbulent burning velocity in premixed turbulent combustion

AR Varma, U Ahmed, M Klein, N Chakraborty - Combustion and Flame, 2021 - Elsevier
The effects of turbulent integral length scale to flame thickness ratio on the bending effect of
turbulent burning velocity variation have been analysed based on a three-dimensional …

Effects of fuel Lewis number on wall heat transfer during oblique flame-wall interaction of premixed flames within turbulent boundary layers

SK Ghai, U Ahmed, N Chakraborty - Flow, Turbulence and Combustion, 2023 - Springer
The influence of fuel Lewis number Le F on the statistical behaviour of wall heat flux and
flame quenching distance has been analysed using direct numerical simulation (DNS) data …