Time-Mean Wall Static Pressure Distributions and Module Friction Factors for Fully Developed Flows in a Rectangular Duct With Spatially Periodic Interrupted-Plate Inserts
Bibliographic record
Abstract
An experimental study of fully developed flows of air in straight rectangular ducts with interrupted-plate inserts is presented. These flows have features akin to those produced in the cores of plate-fin compact heat exchangers. In all, flows in one plain duct and six different ducts with interrupted-plate inserts were studied. Values of the dimensionless geometric parameters of the interrupted-plate ducts, normalized with respect to its half-height, are the following: width of the duct cross-section between 19.68 and 23.58; plate length between 3.286 and 3.938; plate thickness of 0.062, 0.115, and 0.205; and inter-plate spacing between 3.264 and 7.815. Values of the Reynolds number, based on a nominal average velocity and hydraulic diameter, ranged from 1663 to 30993. The results include graphical and tabular presentations of time-mean static pressure distributions along the axial centerline of the top wall of the duct, and module friction factor versus Reynolds number data, all in the periodic fully developed region.
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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 | 0.001 |
| 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".