Numerical investigation of the flow dynamics and heat transfer in a rectangular shell-and-tube heat exchanger
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Bibliographic record
Abstract
Numerical simulations have been carried out to investigate the turbulent flows and coupled conductive/convective heat transfers in a glycol to water shell-and-tube heat exchanger (one shell, one tube doing six passes). The refrigerant (glycol) flows in the tube, and a secondary fluid (water) flows in the shell. The k-ω SST model is used to close the system of equations in the turbulent regime. The present model is first favorably compared and validated against experimental and numerical researches for a concentric annular heated pipe for two radius ratios (R∗=0.1and0.5) at a bulk Reynolds number ReDh=8900 and a Prandtl number Pr=0.71. It is then extended to consider the shell-and-tube configuration with a rectangular shell. Its thermo-hydraulic performances in the tube side are quantified for different Reynolds numbers at the cold inlet ranging from 1.03 × 103 to 1.47 × 105. The performance of the heat exchanger is then enhanced by introducing baffles in the rectangular shell. The results are finally discussed in terms of three global performance metrics.
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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 | 0.000 | 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