A CFD and Experimental Study of Thin Flexible Wire in a Cross Flow
Bibliographic record
Abstract
This research focuses on understanding the drag of thin flexible wires in a cross flow at low laminar Reynolds numbers. Experiments are conducted to measure the drag force for thin flexible wire of O(mm) at Reynolds number, based on wire diameter, range between 250 to 1000 and, the results showed 20% to 30 % of reduction in the drag coefficient as compared to previous quoted results in the open literature. The direct numerical simulation study is carried out for the similar flow (but for a less flexible wire) using the commercial CFD code ANSYS Fluent 15.0 and with mesh generation ANSYS ICEM-CFD 15.0 software. The computational results confirmed the experimental results. To further explain the fluid dynamic mechanism causing the drag reduction in this range of Reynolds numbers, wake surveys are performed using pitot static tube and hot wire experiments as well as time resolved computational numerical simulations. The near wake flow structure suggests the wake transition may be the cause of reduced drag, similar to the drag crisis commonly observed in the wire boundary layer transition regime.
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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) | 0.000 | 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 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".