Numerical simulation of planing hull motions in calm water and waves with overset grid
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Bibliographic record
Abstract
This paper presents simulations of planing hull motions in calm water and waves with the unsteady RANS solver and the overset grid in Star-CCM+. The calm-water simulations were performed for the Fridsma planing hull model at Froude numbers from 0.59 to 1.78. Convergence studies were first carried out on dimensions of overset domain, grid resolution, time step and turbulence model , including k – ɛ , Realizable k – ɛ , k – ω , and SST k – ω models. Uncertainties in numerical solutions due to spatial discretization were examined. The best-practice settings were summarized and used for simulations of the Fridsma planing hull with calm water and regular waves, as well as the investigations of scale effect . For the calm-water simulations, resistance, sinkage and trim of the Fridsma planing hull and LRI-II hull were compared with experimental data and empirical results based on the Savitsky method. Additionally, the recommended settings were also applied to two full-scale planing hulls, LRI-II and OTH-Vp, in irregular waves. Convergence studies were also carried out on wave generation. Predicted motions and vertical accelerations were compared with sea trial data. Validation studies show that the predictions are in good agreement with experimental data.
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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