Tracking the Flow Dynamics in Circulating Fluidized Bed through High-Speed Photography
Bibliographic record
Abstract
In gas–solid circulating fluidized beds, particle velocity and solids flux are crucial parameters for understanding the gas–solid interaction. In the literature, the time-average information has been investigated intensely, but the analysis of instantaneous information remains lacking. In this work, flow behavior in a narrow rectangular circulating fluidized bed has been recorded using a high-speed camera. Then, with a verified correlation between grayscale and solids holdup, particle velocity is computed by tracking local solids holdup characteristics using a two-dimensional cross-correlation, and solids flux is computed by multiplying the particle velocity with particle density and local solids holdup. The time-average information in this work is found to be consistent with that of previous publications. Instantaneous information of particle velocity and solids flux, including relations with local solids holdup, instantaneous radial distributions, instantaneous solids circulating rates, and impacts of macro-fluctuation is analyzed systematically and discussed in detail for the first time.
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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 | 0.001 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.002 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.001 | 0.002 |
| 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".