A Three-Dimensional Simulation of Thermocapillary Flow in a Circular Thin Liquid Film under Zero Gravity
Bibliographic record
Abstract
Dr. D. Pettit, a NASA Astronaut, carried out a thermocapillary flow experiment in a thin water film on-board the International Space Station (ISS) in 2003. The thin water film containing milk powder tracers was formed in a stainless-steel wire ring. The heating of a section of the ring by a soldering iron induced a thermocapillary flow in the water film. This flow was towards the heated part of the ring (outward flow); in the opposite direction (from hot to cold) to the ordinary thermocapillary flows observed in a liquid bridge and a liquid film. To shed light on the discrepancy observed between the space experiment and the ordinary thermocapillary flow, we have carried out a three-dimensional numerical simulation study. In the simulation we have also included the effect of meniscus shape. The simulation results showed that the meniscus shape determines the flow direction. Its consideration in the simulation also led to the prediction of an outward flow (from center to the heated part of the ring) in the water film as observed in the space experiment of Dr. D. Pettit.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.001 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.001 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.001 | 0.001 |
| Scholarly communication | 0.001 | 0.000 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.002 | 0.001 |
| Insufficient payload (model declined to judge) | 0.003 | 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 source (direct Gemma or distilled Codex), 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".