Turbulent Flow over Transverse Ribs at 90 deg and 45 deg to Channel Side-Walls (Invited)
Bibliographic record
Abstract
This paper documents the salient features of favorable pressure gradient turbulent flow over transverse square ribs arranged at 90 o and then at 45 o to the side walls of the test section. The favorable pressure gradient was produced in an asymmetric converging channel that comprised of a straight top wall and a 3 o ramp fitted to a section of the bottom wall of the channel. The transverse ribs were glued onto both the top and bottom walls and the pitch-to-height ratio of the ribs was 10. A particle image velocimetry technique was employed to obtain detailed measurements over the ribs within the converging section and upstream of the converging section where the top and bottom walls of the channel were parallel. These measurements were made in the streamwise-transverse planes located at channel mid-span for the 90 o and 45 o ribs and also close to the trailing edge of the 45 o ribs. The iso-contours and profiles of the mean velocities, Reynolds stresses and production terms in the transport equations for the turbulent kinetic energy and Reynolds stress were obtained to study the effects of pressure gradient and rib inclination to 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) | 0.001 | 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 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".