Measurements of void fraction and bubble properties on a stepped chute using a fiber-optic probe
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Bibliographic record
Abstract
This paper presents results from an experimental laboratory study conducted to investigate the use of a fiber-optic probe for measuring void fraction, bubble sizes, and bubble velocities in the highly aerated flow generated over a stepped chute. The accuracy of the measurements was verified by comparing the discharge measured by using a magnetic flow meter with the integrated discharge computed from the time averaged void fraction and bubble velocity measurements. At a sample rate of 20 kHz the average errors in the void fraction, bubble velocity, and bubble size were estimated to be 1%, 5%, and 6%, respectively. Increasing the data sample rate reduces the errors in the bubble size and velocity. It was concluded that this fiber-optic probe is well suited for making measurements of the void fraction, bubble sizes, and bubble velocities in a unidirectional two-phase flow.Key words: stepped chute, jet flow, air entrainment, fiber-optic probe, air bubble.
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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 it