The Effects of Aspect Ratio on Turbulence Wake Flow Over Right Trapezoidal Prism
Bibliographic record
Abstract
Abstract The shear layer and the near wake region of right trapezoidal prisms with varying streamwise aspect ratios in a uniform flow were investigated using particle image velocimetry. The tested streamwise aspect ratios (AR) based on the height and upper surface were 1 and 4. The Reynolds number based on the prism height and the freestream velocity was 14700. The effects of aspect ratio on the mean flow, Reynolds stresses and third-order moments were investigated, and the results were compared with a square prism. The results show that mean flow separation at the leading edge is not affected by the different geometries and the streamwise aspect ratios. However, the mean recirculation bubbles over the prism and in the wake region show significant differences. Mean flow reattaches over the prism in the AR4 case, but there is no reattachment in the AR1. One-dimensional profiles are used to quantitatively assess the differences in the flow characteristics. It is observed that the magnitudes of Reynolds stresses in the near wake region are an order higher in the AR1 case than in the AR4 case.
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How this classification was reachedexpand
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 itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, 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".