Morón, Daniel; Avila, Marc (2024): Turbulent puffs in transitional pulsatile pipe flow at moderate pulsation amplitudes [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.969126
Always quote citation above when using data! You can download the citation in several formats below.
Published: 2024-07-03 • DOI registered: 2024-08-01
Abstract:
We show that, in the transitional regime of pulsatile pipe flow, at moderate-to-high amplitudes 0.5≲𝐴≲1, the first long-lived turbulent structures are localized and take the form of the puffs and slugs observed in statistically steady pipe flow. We perform direct numerical simulations at many pulsation frequencies (Wo), amplitudes, and Reynolds number (Re) and observe different dynamics of puffs and slugs. At certain flow parameters we find, using a causal analysis, that puffs actively make use of linear instabilities in the laminar Sexl-Womersley (SW) profile to survive the pulsation. Using all these lessons learned, we extend a low-order model by Barkley et al. [Nature (London) 526, 550 (2015)] to reproduce these dynamics. We find a good agreement between the extended model and our numerical results in a broad parametric space of pulsation amplitudes 0.5≲𝐴≲1, frequencies Wo≳5 and 2100≤Re≤3000. With the help of our numerical results, causal analysis and model, we determine that turbulence production has two sources at these flow parameters: the mean shear as in statistically steady pipe flow and the instabilities of the instantaneous pulsatile mean profile.
Keyword(s):
Related to:
Morón, Daniel; Avila, Marc (2024): Turbulent puffs in transitional pulsatile pipe flow at moderate pulsation amplitudes. 9, 24601, https://journals.aps.org/prfluids/abstract/10.1103/PhysRevFluids.9.024601
Funding:
German Research Foundation (DFG), grant/award no. AV 120/6-1: Instabilities, Bifurcations and Migration in Pulsating Flow
(FOR 2688)
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Binary Object | Binary | Morón, Daniel | Numerical simulated | ||
| 2 | Binary Object (File Size) | Binary (Size) | Bytes | Morón, Daniel | Numerical simulated | |
| 3 | Figure | Fig | Morón, Daniel | Numerical simulated | ||
| 4 | Title | Title | Morón, Daniel | Numerical simulated | ||
| 5 | Analytical method | Analyt method | Morón, Daniel | Numerical simulated | ||
| 6 | File name | File name | Morón, Daniel | Numerical simulated | ||
| 7 | Variable | Variable | Morón, Daniel | Numerical simulated | ||
| 8 | File format | File format | Morón, Daniel | Numerical simulated | ||
| 9 | Description | Description | Morón, Daniel | Numerical simulated |
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Status:
Curation Level: Enhanced curation (CurationLevelC) * Processing Level: PANGAEA data processing level 2 (ProcLevel2)
Size:
123 data points