Fin effectivity investigation at solid-liquid phase change in axisymmetric heat exchangers using lattice Boltzmann method
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Bibliographic record
Abstract
The purpose of this article is to analyse the fin parameters in a heat exchanger to optimise the melt rate of PCM. Shell and tube heat exchangers are considered. The shell contains PCM and annular fins placed on the tube wall. The fluid flow, heat transfer, and melting equations were solved using a 2D axisymmetric lattice Boltzmann method (LBM). LBM enthalpy-based method was developed in an axisymmetric form. According to our study of the effect of fin number and length on PCM melting rate, the optimal number of fins for thicknesses of , and is 3, 2, and 2, respectively, while the optimal length of fins for these thicknesses is 0.8R. Moreover, we also introduced a three-fin arrangement with uneven fin length, which increased melting rate. The effect of the secondary fin on the melting rate of PCM was also studied.
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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 | 0.002 | 0.001 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.001 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.001 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
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Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
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