The Rectangular Wall Jet - Part II: Role of the Large-Scale Structures
Bibliographic record
Abstract
The development of the large-scale vortical structures in the three-dimensional turbulent wall jet formed by a rectangular channel with aspect ratio of Ar = 4 was investigated using measurements of the fluctuating wall pressure and the turbulent velocity field in the near and intermediate regions. Contours of the turbulence intensity and one component of the mean streamwise vorticity on either side of the jet centreline indicate that there are two regions of counter-rotating mean vorticity associated with the edges of the lateral shear layers that cause the mean flow to be driven down and outward. The inner vortices remain at approximately the same lateral position as the flow evolves downstream, while the outer regions move away from the wall and outward. The application of the proper orthogonal decomposition (POD) to the fluctuating pressure measurements and a temporal reconstruction revealed that the majority the flow energy was approximately equally divided between an symmetric and an antisymmetric mode. Pressure velocity correlations reveal that the passage of the coherent structure is more complicated that earlier models of this flow would suggest.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot 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.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.001 |
| Scholarly communication | 0.001 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.001 | 0.000 |
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.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
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".