Flow and Heat Transfer Within Segregated Beds of Solid Particles
Why this work is in the frame
A frame that forgets how it found something cannot be audited. These are the routes that admitted this work.
Bibliographic record
Abstract
A model for the transient fluid flow and heat transfer within an axially symmetrical circular cylindrical packed bed of solids containing two different layers of porous matrices is described. The system relates to a cylindrical packed bed fitted with an axial core of a porous matrix that is different from the surrounding cylindrical shell. The influence of permeability ratio (0.0625−16) and Reynolds number (1000 and 2000) on the thermal wave propagation is described. A hot stream of dry air is forced to flow axially at the inlet to the bed. The numerically predicted results are validated against experimental data obtained in a small laboratory test rig 63 mm in diameter and 120 mm in length that is packed with uniform diameter spherical glass beads (3−12 mm in diameter). An analytical model was also developed to estimate the velocity in the bed and compared with the value obtained from the numerical solution of the volume-averaged Navier-Stokes equation. The results are presented for Reynolds numbers of 1000 and 2000. It is found that for a highly fractured core, the heat diffuses radially, while for a low permeability core the heat transfer takes place by advection and diffusion. In the latter case, the Reynolds number has a significant effect on the rate of heat transfer.
Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.
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 it