Characteristics of confined square jets in the vicinity of a free surface.
Bibliographic record
Abstract
The results of an experimental investigation of a turbulent jet flow issuing from a square nozzle in the vicinity of a free surface are presented. Experiments were conducted using a two-dimensional laser Doppler anemometer and a particle image velocimeter. The focus of this study was the near region of the jet (X/B < 30). Here, B refers to the nozzle width and X is the distance from the nozzle exit. LDA measurements were conducted at eight stations downstream of the nozzle exit along the centerline of the jet. Four tailwater depths were used in this study. Additional measurements were also conducted to identify axis switching and to this end measurements were obtained at various transverse locations. PIV measurements were conducted in the near jet region (X/B < 3) corresponding to a tailwater depth of 2.5B. A good comprehension of the fluid dynamics of a square jet expanding in the vicinity of the free surface is achieved. Higher order moments were calculated to provide information on the coherent structures and study the role of velocity fluctuations. Two local peaks on either side of the jet centerline is observed. The difference in magnitudes of the peaks indicate differences in the prevailing entrainment characteristics on the top and bottom portions of the jet. Through the quadrant analysis, sweep and ejection type events were observed. To better understand these events, four kinds of eddies are classified for simplicity and their behavior is discussed.* (Abstract shortened by UMI.) *This dissertation is a compound document (contains both a paper copy and a CD as part of the dissertation). The CD requires the following system requirements: Microsoft Office.Dept. of Civil and Environmental Engineering. Paper copy at Leddy Library: Theses & Major Papers - Basement, West Bldg. / Call Number: Thesis2005 .S26. Source: Masters Abstracts International, Volume: 44-03, page: 1441. Thesis (M.A.Sc.)--University of Windsor (Canada), 2005.
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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 | 0.000 |
| 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 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".