Turbulent Wake of Rectangular Cylinder Near Plane Wall and Free Surface
Bibliographic record
Abstract
This paper reports an experimental study of turbulent wake of a two-dimensional rectangular cylinder in a 2500-mm long, 186-mm wide, and 197-mm deep recirculating open channel. The water level upstream of the cylinder was maintained at 100 mm while the aspect and blockage ratios, defined, respectively, as the cylinder's length to thickness and the cylinder thickness to water depth, were 9 and 0.12. The cylinder was mounted across the channel at three different vertical locations: relatively close to the plane wall, close to the free surface, and relatively remote from both the plane wall and the free surface. For each of the preceding three locations, a particle image velocimetry technique was used to conduct detailed measurements at various streamwise-transverse planes around and downstream of the cylinder. For each test condition, the freestream velocity of the approach flow was kept constant at 0.356 m/s. The Reynolds number based on the cylinder thickness was 4270 and the Froude number was 0.36. From these measurements, the streamlines, isocontours of mean vorticity, as well as the mean velocities and turbulent quantities were obtained to document the effects of the plane wall and the free surface on the flow characteristics.
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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".