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 …

Karlovitz numbers and premixed turbulent combustion regimes for complex-chemistry flames

AN Lipatnikov, VA Sabelnikov - Energies, 2022 - mdpi.com
The structure of premixed turbulent flames and governing physical mechanisms of the
influence of turbulence on premixed burning are often discussed by invoking combustion …

Diffusive effects of hydrogen on pressurized lean turbulent hydrogen-air premixed flames

W Song, FE Hernández-Pérez, HG Im - Combustion and Flame, 2022 - Elsevier
To understand the turbulence-chemistry interaction of lean hydrogen-air premixed flames at
elevated pressures, we conduct a series of high-fidelity direct numerical simulations with …

Lewis number and preferential diffusion effects in lean hydrogen–air highly turbulent flames

HC Lee, P Dai, M Wan, AN Lipatnikov - Physics of Fluids, 2022 - pubs.aip.org
Unsteady three-dimensional direct numerical simulations of highly turbulent, complex-
chemistry, lean hydrogen-air flames were performed by changing the equivalence ratio ϕ⁠ …

Local flame displacement speeds of hydrogen-air premixed flames in moderate to intense turbulence

W Song, H Dave, HG Im, S Chaudhuri - Combustion and Flame, 2022 - Elsevier
Comprehensive knowledge of local flame displacement speed, S d, in turbulent premixed
flames is crucial towards the design and development of hydrogen fuelled next-generation …

[HTML][HTML] Assessment of a flamelet approach to evaluating mean species mass fractions in moderately and highly turbulent premixed flames

AN Lipatnikov, T Nilsson, R Yu, XS Bai… - Physics of …, 2021 - pubs.aip.org
Complex-chemistry direct numerical simulation (DNS) data obtained from lean methane-air
turbulent flames are analyzed to perform a priori assessment of predictive capabilities of the …

Numerical and analytical assessment of finite rate chemistry models for LES of turbulent premixed flames

H Liu, Z Yin, W Xie, B Zhang, J Le, H Liu - Flow, Turbulence and …, 2022 - Springer
Different combustion models for large eddy simulation, including the quasi-laminar (QL),
Eddy dissipation concept (EDC), and partially stirred reactor (PaSR) models, are assessed …

Dissipation and dilatation rates in premixed turbulent flames

VA Sabelnikov, AN Lipatnikov, S Nishiki, HL Dave… - Physics of …, 2021 - pubs.aip.org
Velocity dilatation and total, solenoidal, and dilatational dissipation rates of the total flow
kinetic energy are extracted from three different direct numerical simulation databases …

Backscatter of scalar variance in turbulent premixed flames

VA Sabelnikov, AN Lipatnikov, NV Nikitin… - Journal of Fluid …, 2023 - cambridge.org
To explore the direction of inter-scale transfer of scalar variance between subgrid scale
(SGS) and resolved scalar fields, direct numerical simulation data obtained earlier from two …

Influence of equivalence ratio on turbulent burning velocity and extreme fuel consumption rate in lean hydrogen-air turbulent flames

HC Lee, A Abdelsamie, P Dai, M Wan, AN Lipatnikov - Fuel, 2022 - Elsevier
Abstract Unsteady three-dimensional Direct Numerical Simulations of seven statistically one-
dimensional, planar, highly turbulent, complex-chemistry, lean H 2-air flames are performed …