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Record W358362775

Numerical Modelling of Non-Equilibrium Condensing Steam Flows

2014· article· en· W358362775 on OpenAlexaboutno aff
Avinash C. Pandey

Bibliographic record

VenueResearch Repository (Delft University of Technology) · 2014
Typearticle
Languageen
FieldEarth and Planetary Sciences
Topicnanoparticles nucleation surface interactions
Canadian institutionsnot available
Fundersnot available
KeywordsNozzleCondensationInviscid flowMechanicsSteam turbineSupersonic speedAdiabatic processTransonicEuler equationsWork (physics)ThermodynamicsMechanical engineeringEngineeringPhysicsAerodynamics
DOInot available

Abstract

fetched live from OpenAlex

Two-phase condensing flows are very common in many technical applications, such as rotating machinery operating with steam and nuclear reactors. The occurrence of condensation can lead to a degradation of a component's performance. Thus, the physical understanding and accurate numerical modeling of the condensation process can be of great help in the design process. The present work is focused on the numerical modeling of non-equilibrium condensing steam flows in 1-D Laval nozzles. The fluid dynamic equations for an inviscid and adiabatic flow (Euler equations) are solved using a quasi-1-D finite volume code, which accounts for the nozzle area variation. The model for homogeneous nucleation and the droplet growth rate in high-speed supersonic nozzle flow and also applicable to the wet stages of a steam turbine, is implemented in the present work. In order to assess the accuracy of the condensation model implemented, experimental data of various 1-D supersonic nozzle is compared to the numerical results.

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.

How this classification was reachedexpand

Full frame machine prediction

Teacher imitation

Not calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.

metaresearch head score (Codex)0.000
metaresearch head score (Gemma)0.001
Version: metacan-v3-hybrid-931329e0061cValidation 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: Empirical
Teacher disagreement score0.009
Threshold uncertainty score0.017

Distilled classifier scores by category (both heads)

CategoryCodexGemma
Metaresearch0.0000.001
Meta-epidemiology (narrow)0.0010.000
Meta-epidemiology (broad)0.0010.000
Bibliometrics0.0000.000
Science and technology studies0.0000.001
Scholarly communication0.0010.001
Open science0.0010.001
Research integrity0.0010.000
Insufficient payload (model declined to judge)0.0010.000

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 head0.035
GPT teacher head0.253
Teacher spread0.218 · 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

Classification

machine, unvalidated

Machine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.

The models applied no category: nothing in the taxonomy fit this work.
Study designSimulation or modeling
Domainnot available
GenreEmpirical

How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".

Quick stats

Citations5
Published2014
Admission routes1
Has abstractyes

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Same venueResearch Repository (Delft University of Technology)Same topicnanoparticles nucleation surface interactionsFrench-language works237,207