Residence Time Distribution in a Multistage Agitated Contactor with Newtonian Fluids: CFD Prediction and Experimental Validation
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Bibliographic record
Abstract
Residence time distributions (RTDs) are investigated in a multistage agitated contactor (MAC) for Newtonian fluids. A suitable computational fluid dynamics (CFD) simulation strategy is presented in this work. The effects of operating conditions, reactor geometries, and a turbulent parameter for the RTD curves are discussed. The resulting mean residence times and variances via the CFD simulation are in good agreement with the experimental data. Various liquids are used to simulate the RTD under different flow conditions. The Reynolds number with respect to the impeller speed ranged from 2600 to 50 000. The simulation results show that a cascade of stirred tanks with a back flow (CTB) model is more suitable to describe the flow behavior in a MAC with few stages than an axial dispersion model.
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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 | 0.001 | 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 | 0.001 |
| 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