Cooling in Constant Wall Temperature Microchannels With Thermal Creep Effects
Bibliographic record
Abstract
Fluid flow and heat transfer in the entrance region of rectangular microchannels of various aspect ratios, 0.2 ≤ α* ≤ 1, are numerically investigated in the slip flow regime, 10−3 ≤ Kn ≤ 10−1, with particular attention to the thermal creep effects. Uniform inlet velocity and temperature profiles are prescribed in a microchannel with constant wall temperature. The gas inlet temperature is prescribed higher than the wall temperature in order to study the thermal creep effects in a fluid cooling process. To avoid unrealistically large axial temperature gradients due to the prescribed uniform inlet temperature and upstream conduction associated with low Reynolds number flows encountered in microchannels, an adiabatic section is added to the inlet of the channel, which resembles an adiabatic reservoir. A control volume technique is employed to solve the Navier-Stokes and energy equations which are accompanied with appropriate velocity-slip and temperature-jump boundary conditions at walls. Despite the constant wall temperature, axial and peripheral temperature gradients form in the gas layer adjacent to the wall due to temperature-jump. The simultaneous effects of velocity-slip, temperature-jump and thermal creep on the flow and thermal patterns along with the key flow parameters are examined in detail for a wide range of cross sectional aspect ratios, and Knudsen and Reynolds numbers (0.1 ≤ Re ≤ 5). Present results indicate that thermal creep effects influence the flow field and the temperature distribution significantly in the early section of the channel.
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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) | 0.000 | 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".