Modeling thermal diffusion flames with fractal dimensions

RA El-Nabulsi, W Anukool - Thermal Science and Engineering Progress, 2023 - Elsevier
In this study, we have discussed the implications of fractal dimensions in flame diffusion
theory based on the notion of non-integer dimensional space for complex fractal media. We …

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 …

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 …

Statistical behavior of turbulent kinetic energy transport in boundary layer flashback of hydrogen-rich premixed combustion

U Ahmed, AL Pillai, N Chakraborty, R Kurose - Physical Review Fluids, 2019 - APS
A direct numerical simulation (DNS) database for boundary layer flashback of a premixed
hydrogen-air flame with an equivalence ratio of 1.5 in a fully developed turbulent channel …

Assessment of Bray Moss Libby formulation for premixed flame-wall interaction within turbulent boundary layers: Influence of flow configuration

U Ahmed, N Chakraborty, M Klein - Combustion and Flame, 2021 - Elsevier
Three-dimensional direct numerical simulations (DNS) of two different flow configurations
have been performed for premixed flames interacting with chemically inert isothermal walls …

Statistical behaviour and modelling of variances of reaction progress variable and temperature during flame-wall interaction of premixed flames within turbulent …

SK Ghai, U Ahmed, N Chakraborty - Flow, Turbulence and Combustion, 2024 - Springer
The statistical behaviour of the transport of reaction progress variable variance, c ″2~, and
non-dimensional temperature variance, T ″2~, have been analysed using three …

[HTML][HTML] Transient 3D simulations of turbulent premixed flames of gas-to-liquid (GTL) fuel in a fan-stirred combustion vessel

AM Sadeq, SF Ahmed, AK Sleiti - Fuel, 2021 - Elsevier
This work aims to conduct turbulent flame studies of GTL fuel and 50/50 diesel-GTLblend
and compare them to diesel under a wide range of equivalence ratio (0.7< Ф< 1.3) and …

Evolutions of strain rate and dissipation rate of kinetic energy in turbulent premixed flames

N Chakraborty, C Kasten, U Ahmed, M Klein - Physics of Fluids, 2021 - pubs.aip.org
The statistical behaviors of the evolutions of the components of the strain rate tensor and
Favre-averaged dissipation rate of kinetic energy are analyzed using direct numerical …

[HTML][HTML] Flame wrinkling and self-disturbance in cellularly unstable hydrogen-air laminar flames

Y Xie, J Yang, X Gu - Combustion and Flame, 2024 - Elsevier
Particle image velocimetry (PIV) was employed to investigate the disturbance of unstable
laminar hydrogen-air outwardly propagating spherical flames in a spherical explosion …

[HTML][HTML] Influence of preferential diffusion on the distribution of species in lean H2-air laminar premixed flames at different equivalence ratios

FW Young, U Ahmed, N Chakraborty - Fuel, 2025 - Elsevier
The influence of equivalence ratio on preferential diffusion effects and the resulting changes
in the distributions of major species and their reaction rates have been analysed based on 2 …