Particle penetration through rectangular-shaped cracks
Bibliographic record
Abstract
An outdoor-to-indoor particle penetration experiment was undertaken to validate an air infiltration flow and particle penetration model that simulates particle transport through cracks between a pair of parallel plates. Results indicated that the infiltration flow model agreed with experimental observations, and the infiltration flow field could be assumed laminar for typical outdoor-to-indoor differential pressures (1 to 15 Pa). Observations of the particle deposition pattern on crack surfaces indicated that gravitational sedimentation was the dominant deposition mechanism for 1.4 µm particles. Particle penetration coefficient (P p ) increased monotonously with increasing differential pressure and crack height (H), and decreased monotonously with increasing crack length (L). For H > 0.305 mm, and L < 30 mm cracks, P p was greater than 0.8 for the tested conditions and particle sizes. Complete penetration was observed for H > 0.406 mm cracks under the outdoor-to-indoor differential pressures tested. The particle penetration model was able to predict experimentally derived P p . Key words: infiltration, particle penetration coefficient, gravitational sedimentation, Brownian diffusion.
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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 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.001 |
| 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".