Numerical Study of Influence of Fluid Distribution over Heat Storage into Porous Media
Bibliographic record
Abstract
This paper presents the first results of an original physical model developed for dual media thermocline heat storage to investigate the influence of fluid distribution over performance. The technology, named "dual-media thermocline heat storage" or "liquidsolid regenerator heat storage" is based on a thermal oil flowing through a double particle-size porous media. The particular dual-media used in a French Alternative Energies and Atomic Energy Commission (CEA) experimental device is considered in this study, composed of sand (3mm diameter) and gravel (30mm diameter). The physical model solves usual mass, momentum and heat equations (Navier-Stokes) considering multi-dimensional behaviour to take into account flow distribution influence and considering separate thermal behaviour for the fluid phase, the gravel phase and the sand phase. The originality of the model consist in the separation of gravel and sand for the thermal behaviour of the porous media. The first part of the paper is a validation step against experimental data obtained in the CEA experimental device (3m high storage, 1m diameter) that has been specifically modified to study fluid distribution by adding inlet devices to force a non-ideal flow profile,. Then the second part of the paper is dedicated to the numerical study of charges for a 2Daxisymetric cylindrical volumes representing the storage. In one case, a uniform distribution all over one end is done, on the other case a uniform distribution on an axial reduced surface of this end.
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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) | 0.001 | 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 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".