Hydrodynamic Observations of Trickle Beds under Filtration Conditions
Bibliographic record
Abstract
Experiments were carried out to investigate the evolving hydrodynamics of trickle-bed reactors as altered by the concomitant filtration of a flowing suspension containing micrometer-scale fines. The filtration efficiency, two-phase pressure drop, and bed specific deposit (mass of deposited fines per unit of reactor volume) were monitored using flows of air and a kaolin-containing kerosene suspension to clarify the roles of packing (smooth vs porous collectors), bed height, bed entrance distribution of the suspension, makeup addition in recirculation mode, gas superficial velocity, and flow regime transition. It was observed that deposition did not exhibit a seamless pattern but rather consisted of scattered mesoscale islands of deposits, several collector-diameters in size, separated by relatively large plug-free multiple interconnected pores. These corridors favored the in situ development of bed maldistribution that favored short-circuiting of the flow and leveling off of the bed pressure drop. Contrary to expectation, the transition from trickle flow to pulse flow due to progressive bed obstruction was not systematic, and to occur, it required a minimum clean-bed starting liquid holdup value.
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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 | 0.001 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.001 |
| 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".