CFD Investigation of Turbulent Cross-Flow Behavior in Tube Bundles: In-Line Vs Staggered Configuration
Bibliographic record
Abstract
This study numerically investigates the turbulent flow around four cylinders arranged in a square configuration at a Reynolds number of 3000, focusing on understanding flow dynamics in tube bundles.Using the Reynolds-Averaged Navier-Stokes (RANS) approach with the k- SST turbulence model, the simulations are conducted with the open-source software Code_Saturne.Two configurations are analyzed: in-line ( = 0) and staggered ( = 45), both with a spacing ratio of P/D = 1.5.The global properties that were computed, such as the mean velocities and pressure, were discovered to be highly consistent with the available numerical measurements.The bistability phenomenon was shown based on the different fields of velocity in in-inline configuration.At the staggered arrangement, a jet flow is observed which is distinct from the regular gap flow, characterized by a narrow width and high velocity.Altering the wake shape can cause significant variations in the magnitude and direction of the jet flow, resulting in potential structural vibrations that must be considered in practical engineering applications.
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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".