Compartmental modelling of turbulent fluid flow for the scale‐up of stirred tanks
Bibliographic record
Abstract
In this work, the results of single phase CFD simulations of mixing vessels with four baffles agitated by a Rushton turbine are used to determine the parameters of a two‐compartment model that describes the turbulent non‐homogeneities therein. An improved method is proposed to find the boundary between the two characteristic regions. Using this method, the effects of different conventional scale‐up criteria including constant impeller speed, constant impeller tip speed and constant power consumption per liquid volume, on the value of the compartmental model parameters are investigated. It can be observed that the distribution of the turbulent energy dissipation rate and, as a result, the compartmental model parameters change considerably when following conventional scale‐up rules. The concept of a general map of compartment energy dissipation rate and volume ratios, which can be used for the scale‐up of stirred tanks, is introduced.
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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".