Investigation of turbulence characteristics in a gas cyclone by stereoscopic PIV
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Bibliographic record
Abstract
Abstract Stereoscopic particle image velocimetry (Stereo‐PIV) was used as the tool to observe the turbulence characteristics in a gas cyclone. In the cylindrical and conical parts of the cyclone, intensive fluctuation occurs in the inner quasi‐forced vortex, especially in its core where the precessing vortex core dominates. In the dust hopper, strong turbulence is observed at the interface between the downward flow and the upward flow, as well as in the centerline of the cyclone. Turbulence intensity in the tangential, axial, and radial directions and the Reynolds stresses are seen to be anisotropic: this anisotropy provides the evidence of more appropriateness of the Reynolds stress model (RSM) than the standard k‐ε model, and the renormalization‐group k‐ε model for numerical simulations in gas cyclones. Due to flow instability and back‐mixing caused by the turbulence, separated particles could disperse into and be re‐entrained by the upward flow from the bin to degrade the separation efficiency of the cyclone. © 2006 American Institute of Chemical Engineers AIChE J, 2006
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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)
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 it