PERIODIC CHARACTERISTICS OF LAMINAR DEVELOPING FLOW THROUGH A HORIZONTAL TUBE SUBJECT TO RADIAL OSCILLATIONS
Bibliographic record
Abstract
This paper presents a numerical study of periodic, developing, laminar, incompressible flow in a straight horizontal tube subject to low frequency oscillations about the vertical diameter at its entrance. The three-dimensional flow field is influenced by the tangential and Coriolis forces and is governed by three independent parameters: the flow Reynolds number Re, the oscillation Reynolds number Re ω (based on the tub’s oscillation frequency ω) and the angular amplitude A of the tube’s oscillation. It is characterized by a periodic secondary transverse flow, normally consisting of two symmetrical vortices, and an oscillating axial field. The local friction factor exhibits large variations along the tube;s circumference. Its average value is higher than the corresponding value for stationary tubes, and increases with both Re ω and A. At high Re ω the tube’s oscillation can induce flow reversal, the limits of this flow reversal have been established in terms of the three governing parameters. Finally, the existence of an oscillating developed flow region has been established.
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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 | 0.001 |
| 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".