SPH Simulations for Turbulence Control of Magnetohydrodynamic Poiseuille Flow
Bibliographic record
Abstract
A new magnetohydrodynamic (MHD) turbulence control methodology is proposed, in which the applied stationary magnetic field is not simply aligned along the streamwise or transverse flow direction, but along a direction that forms an angle within the range of 0° (i.e. streamwise flow direction) to 90° (transverse flow direction) to the main fluid flow. For planar Poiseuille flow, the magnitude of this angle is optimized by using the smoothed particle hydrodynamic (SPH) methodology. The best results in what concerns turbulence control are obtained when this angle falls in the range of 20° to 50°, for the cases studied, which consider an electrically conducting flow of Reynolds number 104 with an electrical conductivity of σ = 1.0×106 (Ω m)−1, and an applied magnetic field B = 0.2 Tesla, there is no onset of turbulence up to the end of the simulation time (6.79 s).
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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 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.001 |
| Scholarly communication | 0.001 | 0.000 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.001 | 0.001 |
| 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 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".