Validation of the new mechanistic scale‐up of gas‐solid fluidized beds using advanced non‐invasive measurement techniques
Bibliographic record
Abstract
Abstract This study focuses on the validation of a new mechanistic of scale‐up for hydrodynamics similarity of gas‐solid fluidized bed reactors that was developed in our Multiphase Reactors Engineering and Applications Laboratory (mReal). It is based on maintaining identical or relatively similar time‐averaged radial profiles of gas holdups in two differently sizes gas‐solid fluidized beds to achieve local and global similarities of the dimensionless hydrodynamic parameters. This is because the gas‐dynamic dictates the hydrodynamics of gas‐solid fluidized beds. The new scale‐up method has been successfully validated by assessing for the first time the local hydrodynamic parameters, such as time‐averaged cross‐sectional distributions and radial‐profiles of gas and solids holdups at different axial levels, which were measured by gamma‐ray computed tomography technique. In addition, the particle velocity field and turbulent parameters (shear stress, normal stresses, and turbulent kinetic energy) were measured by radioactive particle tracking technique. The experimental results showed that achieving similarity in the radial profiles of the gas holdup in the geometrically similar beds is essential for ensuring identical or relatively similar local and global hydrodynamics similarity. As the differences increase in terms of magnitude and trend in the gas holdup radial profiles between two beds, the differences increase in the detailed hydrodynamics.
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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 | 0.000 |
| 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 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".