Impact of a vortex dipole with a semi-infinite rigid plate
Bibliographic record
Abstract
The physics of a two-dimensional vortex dipole impinging on the tip of a semi-infinite rigid plate is numerically examined. The dipole trajectory is initially orthogonal to the plate and aligned with its tip. The impact behavior is examined for three dipole Reynolds numbers. As the dipole approaches, vorticity is induced along the plate, as in the case of a dipole approaching a full wall, and is additionally shed from the tip. Upon impact, the dipole effectively splits, with half of it interacting with the vorticity induced on the plate and the other half with the vorticity shed from the tip. Each half of the original dipole forms a new secondary vortex pair whose behavior depends upon the Reynolds number of the original dipole. Contingent upon the rate of momentum diffusion, these secondary (and tertiary) vortex pairs may return and impact the plate again. Herein, we detail the interaction of the dipole impact at various Reynolds numbers, with a focus on the vortex dynamics and the distributed load imposed on the rigid plate by the fluid.
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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 | 0.001 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.001 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.001 | 0.002 |
| Scholarly communication | 0.001 | 0.000 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.001 | 0.001 |
| Insufficient payload (model declined to judge) | 0.003 | 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".