Volatile bubble growth in a decompressing magmatic system: A many‐bubble model
Bibliographic record
Abstract
Recently, a new model of volatile bubble growth in magma with coupling to the melt advection field was proposed. In that model, the competitive effects of the other (randomly located) bubbles on the growth dynamics were treated in a mean‐field sense. That model predicts the possibility of dynamical transitions to or from inflationary regimes, whereby the growth rate and the average bubble radius increase rapidly. We present here numerical results pertaining to a decompressing magma, in which the fluid pressure explicitly decreases at a constant rate, thus simulating the ascent of the magma from a state of low volatile supersaturation. It is seen that, as the supersaturation increases (due to decompression), the system may undergo a transition to an inflationary regime, leading to a sudden increase in vesicularity. The numerical results show that the system dynamics may exhibit an oscillatory behavior characterized by a decompression‐induced succession of transitions to and from inflationary regimes. The model also shows that a constant bubble growth rate solution exists for intermediate times. This feature is in agreement with some experimental observations reported in the literature.
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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 | 0.001 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.002 | 0.001 |
| Insufficient payload (model declined to judge) | 0.002 | 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".