Evolution of the instantaneous flow structure in gas-solid fluidized beds
Bibliographic record
Abstract
Gas-solid fluidized beds have been widely used as reactors in the industry. Per the operations, fluidized beds can be classified as bubbling fluidized bed (BFB), turbulent fluidized bed (TFB), circulating turbulent fluidized bed (CTFB), circulating fluidized bed riser (CFB riser) and circulating fluidized bed downer (CFB downer). For fluidized beds, the instantaneous flow structure determines the overall performances. However, in the literature, the instantaneous flow structure remains lacking for TFB, CTFB, high-density CFB riser and high-density CFB downer. As a result, the evolution of the instantaneous flow structure in fluidized beds has not been well studied. In this work, instantaneous flow information in fluidized beds was acquired using an optical fiber probe. Then, according to the phase characteristics, instantaneous flow structures were demarcated as the “dilute structure” and “dense structure”. Finally, the evolution of instantaneous flow structures is, for the time, thoroughly discussed for gas-solid fluidization.
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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 | 0.001 | 0.003 |
| Meta-epidemiology (narrow) | 0.002 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.002 |
| Bibliometrics | 0.004 | 0.004 |
| Science and technology studies | 0.001 | 0.001 |
| Scholarly communication | 0.002 | 0.001 |
| Open science | 0.002 | 0.001 |
| Research integrity | 0.002 | 0.001 |
| Insufficient payload (model declined to judge) | 0.006 | 0.010 |
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".