Preponderance of hairpin vortices detected from very-large-scale, direct numerical simulations of three flat-plate boundary layers
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Bibliographic record
Abstract
We report high-quality flow visualization results obtained from very-large-scale direct numerical simulation (VLS DNS) of three nominally zero-pressure-gradient, smooth, incompressible, flat-plate boundary layers (ZPGFPBLs). The number of grid points is slightly over 1 billion per simulation. In all the three boundary layers, the momentumthickness Reynolds number develops continuously from 80 to approximately 2000. A unique aspect of the present VLS DNS study is its strong connection and remarkable consistency with the large body of classical ZPGFPBL experimental visualization work that began in the late 1950s, peaked in the early 1980s and still somewhat active until this day. Our VLS DNS results demonstrate, beyond reasonable doubt, a preponderance of hairpin vortices in ZPGFPBLs upto momentum-thickness Reynolds number 2000. Based on these results, it is possible to futher explore the kinematics and dynamics of largescale-motion (LSM) and very-large-scale-motion (VLSM) in ZPGFPBLs.
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Full frame distilled prediction
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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)
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Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
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