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 …

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 …

Vorticity budgets in premixed combusting turbulent flows at different Lewis numbers

C Dopazo, L Cifuentes, N Chakraborty - Physics of Fluids, 2017 - pubs.aip.org
A direct numerical simulations database of statistically planar turbulent premixed flames
using a simple Arrhenius type irreversible chemistry for different values of global Lewis …

Lewis number effects on flame speed statistics in spherical turbulent premixed flames

G Ozel-Erol, M Klein, N Chakraborty - Flow, Turbulence and Combustion, 2021 - Springer
The influences of characteristic Lewis number Le Le on the statistics of density-weighted
displacement speed and consumption speed in spherically expanding turbulent premixed …

Comparison of flame propagation statistics extracted from direct numerical simulation based on simple and detailed chemistry—Part 1: Fundamental flame turbulence …

FB Keil, M Amzehnhoff, U Ahmed, N Chakraborty… - Energies, 2021 - mdpi.com
In the present study, flame propagation statistics from turbulent statistically planar premixed
flames obtained from simple and detailed chemistry, three-dimensional Direct Numerical …

[HTML][HTML] Data driven analysis and prediction of MILD combustion mode

K Jigjid, C Tamaoki, Y Minamoto, R Nakazawa… - Combustion and …, 2021 - Elsevier
Direct numerical simulation (DNS) data of moderate or intense low-oxygen dilution (MILD)
combustion and a planar flame are analysed to identify quantities influencing the unique …

Statistical behaviors of conditioned two-point second-order structure functions in turbulent premixed flames in different combustion regimes

P Brearley, U Ahmed, N Chakraborty, A Lipatnikov - Physics of Fluids, 2019 - pubs.aip.org
The second-order structure functions and their components conditioned upon various events
have been analyzed for unweighted and density-weighted velocities using a Direct …

Comparison of the reactive scalar gradient evolution between homogeneous MILD combustion and premixed turbulent flames

HSAM Awad, K Abo-Amsha, U Ahmed, N Chakraborty - Energies, 2021 - mdpi.com
Moderate or intense low-oxygen dilution (MILD) combustion is a novel combustion
technique that can simultaneously improve thermal efficiency and reduce emissions. This …

Sub-grid reaction progress variable variance closure in turbulent premixed flames

FB Keil, M Klein, N Chakraborty - Flow, Turbulence and Combustion, 2021 - Springer
The statistical behaviour and modelling of the sub-grid variance of reaction progress
variable have been analysed based on a priori analysis of Direct Numerical Simulation …

Effects of Lewis number on the evolution of curvature in spherically expanding turbulent premixed flames

A Alqallaf, M Klein, N Chakraborty - Fluids, 2019 - mdpi.com
The effects of Lewis number on the physical mechanisms pertinent to the curvature evolution
have been investigated using three-dimensional Direct Numerical Simulation (DNS) of …