On the phase velocities of the motions in an offset attaching planar jet
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Bibliographic record
Abstract
An experimental investigation was performed to characterize the phase velocity of different frequency fluctuations in a turbulent offset attaching jet with a Reynolds number of 44 000 and initial offset distance of H j . The velocities were determined from the change in the phase of the cross-spectra of the fluctuating pressure along the wall and the cross-spectra of the fluctuating wall pressure and fluctuating velocity throughout the flow. The results showed there was upstream propagation of the wall pressure fluctuations near the separation point associated with the flapping motion, but the upstream propagation apparent in the correlation coefficient of the pressure was due to higher frequency fluctuations associated with the recirculating flow. The phase velocities determined from the pressure–velocity cross-spectra for the higher frequency motions showed less-frequency dependence and less acceleration than those determined from the pressure cross-spectra. There was also evidence of two velocities for the shear layer motions and a velocity for the lower frequency wall jet motions not apparent in the results from the pressure cross-spectra. Thus, the phase velocities determined from pressure cross-spectra do not fully reflect the velocities of the motions in the flow.
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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) | 0.000 | 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.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it