Evaluating Two-Phase Flow Patterns in Airlift pumps Using Image Processing Technique
Bibliographic record
Abstract
One of the most important criteria in determining the performance of airlift pumps is to determine the two-phase flow characteristics in the pump riser.These include the determining the average void fraction and both the slug velocity and frequency of the two-phase flow in the vertical pipe.In the current work, three image processing methods were examined to describe the two-phase hydrodynamic parameters as they relate to the pump performance.Experiments were carried out using Xanthan Gum-water solutions with varying XG concentrations between 0.05-0.25 wt% in a pump riser of 31.75 mm in diameter.High-speed camera with 3000 f/s capabilities was used to obtain the flow visualisation images for the two-phase flow distribution downstream of the pump injector.The preliminary results suggested that the image processing technique using background subtraction algorithm can be an effective approach in evaluating the flow structure and consequently can be used to determine void fraction and slug characteristics.
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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 | 0.001 | 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".