Dispersion-Concentric Model for Mass Transfer in a Packed Bed with a Countercurrent Flow of Gas and Liquid
Bibliographic record
Abstract
A model for the concentration of the solute in the gas in a packed column with a countercurrent flow of gas and liquid was developed. The mass-transfer coefficient was needed for the model solution. A 0.61 m diameter column filled with 38-mm ceramic Intalox saddles was used to measure mass-transfer coefficients of air−water and air-carboxymethylcellulose (CMC) solution systems. A 1.2 m diameter column filled with 50-mm ceramic Intalox saddles was also used with an air and calcium chloride solution. For varied flow rates of air from 1422 to 8017 kg m -2 h -1 and water (or the CMC solution) from 3888 to 15 516 kg m -2 h -1, the measured concentrations of water vapor in air at the bed exit were within 2% with the model prediction. For the air−calcium chloride solution with air flow rates of 1872−7740 kg m -2 h -1 and liquid rates of 12 276−45 980 kg m -2 h -1, the average deviation between the measured concentrations and the predicted values was about 9%.
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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 | 0.001 |
| 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 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".