Investigation of Variable Cross-Sectional Flow Area for an Enhanced Thermo-Hydraulic Performance in Microchannels
Bibliographic record
Abstract
The effect of variable cross-sectional flow area owing to the change in protrusion height along the flow direction, on the thermo-hydraulic performance was studied experimentally. A steady-state study that utilised single-phase water as the working fluid was conducted for Reynolds number range between 1100 and 4400, with a constant heat input of 1000 W along the microchannel length of 30 mm. Two microchannel configurations, namely (a) contracted cross-sectional flow area and (b) expanded cross-sectional flow area, were investigated together with a plain microchannel to evaluate the thermo-hydraulic performance. The average hydraulic diameters of the annular microchannels are kept constant at 600 m for both configurations. The microchannel with an expanded cross-sectional flow area yielded the highest Nusselt number of 49.6 at Reynolds number of 4377. The same microchannel achieved the highest thermo-hydraulic performance index of 1.59 at Reynolds number of 1974, using the plain microchannel as the reference.
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.
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) | 0.000 | 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 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".