Analysis of water-air multiphase flow through a pipeline with two leaks using numerical and experimental methods
Why this work is in the frame
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Bibliographic record
Abstract
Given that most petroleum companies produce and transport both oil and gas at the same time, multiphase flows are extremely important in the oil and gas industry. Common causes of pipeline leaks include corrosion, aging, and metal deterioration. As a result, developing a practical technique to identify and locate leaks in pipelines is needed. In the present work, a 3D numerical model is developed using Ansys-Fluent considering the Volume Of Fluid (VOF) approach coupled with the 𝑘−𝜀 turbulence model to investigate the occurrence of simultaneous leaks (1st leak 3 mm and 2nd leak 1.8 mm) within a pipeline conveying multiphase flow. The numerical results are validated against experimental data collected from a flow loop system in the Lab, where a significant level of agreement was observed. Moreover, the flow behavior in the pipeline, as well as in the surrounding area of the leaks (water tank), is evaluated. For instance, the case showing the lowest value of the air volume fraction in the pipeline presents the highest value in the water tank. Additionally, Log Mel Spectrogram representation allows the identification of occurring phenomena, including air phase introduction and the presence of leakage in the pipeline.
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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 | 0.001 | 0.001 |
| 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