Large eddy simulation of the effects of mild swirl on the near field of a round free jet
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Bibliographic record
Abstract
The near fields of turbulent round free jets with swirl numbers of S=0.0 and 0.24 are modeled with large eddy simulations that use a dynamic Smagorinsky subgrid scale model. The time-averaged results are in accordance with other numerical and experimental data. Instantaneous plots of vorticity are used to examine the evolution of and interaction between coherent structures. Ring structures aligned with the plane normal to the flow form downstream of the jet shear layer and collide with the streamwise braid structures. The resulting interaction cause the rings to break apart into smaller, less organized turbulence structures. The addition of swirl increases the number of streamwise braids, which enhances the breakdown mechanism of the rings. The results suggest that the increased entrainment observed in swirling flows is due to the action of the braids rather than the rings.
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Full frame distilled prediction
Teacher imitationNot 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.
Codex and Gemma teacher scores by category
| 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 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 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 it