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Application of Eddy Dissipation Concept for Modeling Biomass Combustion, Part 1: Assessment of the Model Coefficients

2016· article· en· W2530623012 on OpenAlex
Mohammadreza Farokhi, Madjid Birouk

Why this work is in the frame

A frame that forgets how it found something cannot be audited. These are the routes that admitted this work.

affAt least one author lists a Canadian institution in the pinned OpenAlex snapshot.
fundA Canadian funder is recorded on the work.

Bibliographic record

VenueEnergy & Fuels · 2016
Typearticle
Languageen
FieldEngineering
TopicCombustion and flame dynamics
Canadian institutionsUniversity of Manitoba
FundersNatural Sciences and Engineering Research Council of Canada
KeywordsTurbulenceCombustionLarge eddy simulationDissipationFlow (mathematics)MechanicsJet (fluid)Sensitivity (control systems)ThermodynamicsRange (aeronautics)Environmental scienceChemistryMaterials sciencePhysicsEngineeringPhysical chemistry

Abstract

fetched live from OpenAlex

The eddy dissipation concept (EDC) model has the ability to incorporate detailed chemistry in turbulent combustion, which makes it attractive for simulating a wide range of industrial combustion systems. However, its application for modeling weakly turbulent reacting flows and slow chemistry poses a real challenge. The present study examines the influence of the EDC model’s coefficients, with respect to turbulent flow field characteristics. In order to assess the sensitivity of EDC model’s constants, simulations of two distinct jet flames covering weakly and highly turbulent flow conditions are performed. The predictions are compared with published experimental measurements. The findings of this study revealed that EDC predictions of the characteristics of weakly turbulent reacting flow can be improved by changing the model’s constants. The study also showed that, in comparison with the standard EDC, modifying the model’s coefficients produced improved predictions of the characteristics of highly turbulent reacting flow regions. The conclusions of the analysis carried out in this study are used to simulate the gas-phase combustion of a small-scale biomass furnace using the EDC model, which is presented in the companion paper for this study.

Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.

Full frame distilled prediction

Teacher imitation

Not calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.

metaresearch head score (Codex)0.000
metaresearch head score (Gemma)0.000
Version: codex-gemma-dda1882f352aValidation status: machine_predicted_unvalidated
Candidate categoriesnone
Consensus categoriesnone
DomainCandidate signal: none · Consensus signal: none
Study designCandidate signal: Simulation or modeling · Consensus signal: Simulation or modeling
GenreCandidate signal: Empirical · Consensus signal: none
Teacher disagreement score0.858
Threshold uncertainty score0.224

Codex and Gemma teacher scores by category

CategoryCodexGemma
Metaresearch0.0000.000
Meta-epidemiology (narrow)0.0000.000
Meta-epidemiology (broad)0.0000.000
Bibliometrics0.0000.000
Science and technology studies0.0000.000
Scholarly communication0.0000.000
Open science0.0000.000
Research integrity0.0000.000
Insufficient payload (model declined to judge)0.0000.000

Machine scores (provisional)

The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.

Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.

Opus teacher head0.013
GPT teacher head0.247
Teacher spread0.235 · how far apart the two teachers sit on this one work
Validation statusscore_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it