Numerical comparative analysis of Richtmyer–Meshkov instability simulated by different SGS models
Bibliographic record
Abstract
The multi-mode Richtmyer–Meshkov instability is numerically simulated by the large-eddy simulation code MVFT (multi-viscous-flow and turbulence). The Vreman, dynamic Smagorinsky, and stretched-vortex models are used to model the subgrid-scale flux of turbulence transport in simulations. The calculated widths of turbulent mixing zones are all in good agreement with the experimental results, and there is a little difference among the different SGS models. However, the decay factors of turbulent kinetic energy differ significantly for different SGS models, with relative error up to about 50%. It is concluded that the dynamic Smagorinsky model and stretched-vortex model can both predict the energy backscatter, with the prediction of the former weaker, while after reshock, the dynamic Smagorinsky model is absolutely as dissipative as the Vreman model.
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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) | 0.001 | 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) | 0.001 | 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".