Effects of Reynolds Number and Streamwise Aspect Ratio on Turbulent Wakes Generated by Rectangular Cylinders
Bibliographic record
Abstract
Abstract In the present study, the effects of Reynolds number on the flow characteristics around rectangular cylinders in uniform flow with length-to-height aspect ratios (AR) of 1 and 4 were examined experimentally using particle image velocimetry. High spatial resolution experiments were performed at Reynolds numbers of 3000, 7200, 14700 and 21000 for each aspect ratio. The results show that the separated flow is directly shed into the near wake region for AR1, while mean flow reattachment occurs on AR4, irrespective of the Reynolds number. The characteristics of the primary, secondary and wake vortices formed around the cylinders show dependency on both aspect ratio and Reynolds number. The streamwise mean velocity, turbulence intensities, transport of turbulent kinetic energy by fluctuating velocities in terms of quadrant analyses are also discussed. One-dimensional profiles are presented to quantitatively assess the effects of Reynolds number and aspect ratio.
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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) | 0.000 | 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) | 0.001 | 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".