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TNF Workshop Abstract
This workshop is an open and ongoing international collaboration
among experimental and computational researchers in turbulent
combustion. The current
emphasis is on fundamental issues of turbulence-chemistry interactions
in gaseous flames. The objectives are to:
Establish an internet library of well-documented flames that
are appropriate for model validation and the advancement of basic
scientific understanding of turbulent combustion.
Provide a framework for collaborative comparisons of measured and
Identify priorities for further experimental and computational
The TNF library includes multiscalar and velocity data from several flows and flames that carry through a progression in complexity of the chemistry and the flow field. Having started with simple jet flames of hydrogen, our attention has moved to flames of simple hydrocarbon fuels (methane, natural gas, and methanol), which include modeling challenges such as local extinction and re-ignition, detached or lifted reaction zones, auto-ignition, flow recirculation, and swirl.
Areas of increasing interest include combustion of more complex fuels and development of models that can address a broad range of combustion regimes, including nonpremixed, partially-premixed, stratified, and premixed flames. The selection of target flames and focus topics for future TNF Workshops will be based on the scientific interests of the organizers and active participants.
Past Workshops and main topics:
Hydrogen jet flames and NO formation
Boulder, Colorado, USA
Piloted and bluff-body flames with CH4
Extinction/re-ignition in piloted flames
Chemistry, mixing, and radiation submodels
Mixing models, bluff-body and swirl flames, new experiments
Scalar dissipation, extinction
and re-ignition, bluff-body and
swirl flames, LES and DNS.
Bluff-body and swirl flame comparisons, dissipation scales in flames, LES quality assessment, DNS, considerations for premixed model validation
Planning for extension of model validation work to include a broader range of combustion modes and more complex hydrocarbon fuels, LES quality assessment, issues for comparing experiments and LES
Overview on lifted flames in hot coflow, modeling approaches for partially premixed flames, stratified flame comparisons, progress on kinetics and diagnostics for DME and ethanol, best practice in LES.
Stratified and premixed flame comparisons, differential diffusion in premixed flames, lifted flames, DME flames and chemistry, Oxy-fuel and MILD combustion, temporally resolved data, LES/DNS quality, opposed jet flames.
Pleasanton, California, USA
Stratified flame comparisons, turbulent opposed jet flames, piloted DME flames, utilizing temporally-resolved data, enclosed and unsteady combustion, flame-wall interaction, LES quality and UQ, modeling of DNS cases
Stratified flams update, Sydney piloted flame comparisons, progress variable and regime indicators, piloted DME flames, turbulent counterflow flames, flame-wall interaction, new burners, experiments and simulations at elevated pressure.
For additional information or to be included on the TNF
email distribution contact Robert Barlow (firstname.lastname@example.org)
Technical contributions to this site by the organizers and participants
of the workshop series are gratefully acknowledged. Sandia's
role in coordinating TNF Workshop activities is supported by
the US Department of Energy, Office of Basic Energy Sciences,
Division of Chemical Sciences, Geosciences, and Biosciences.