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Uruba, Václav; Procházka, Pavel and Duda, Daniel, 2026, Dynamical topology of the near wake behind a slender circular cylinder with variable surface roughness, undefined, http://hdl.handle.net/20.500.14592/104
| dc.contributor.author | Uruba, Václav |
| dc.contributor.author | Procházka, Pavel |
| dc.contributor.author | Duda, Daniel |
| dc.date.accessioned | 2026-06-23T08:21:56Z |
| dc.date.available | 2026-06-23T08:21:56Z |
| dc.date.issued | 2026 |
| dc.description | We present a controlled experimental dataset of the near wake behind a long, smooth, and rough-surface circular cylinder, acquired with time-resolved classical and stereoscopic PIV in a low-turbulence free stream. A high-aspect-ratio model is used to approximate the infinite-span limit, and measurements are taken in the central span to minimize end effects across a subcritical Re of about 5k. We report robust, facility-independent results: instantaneous and mean velocity fields in the streamwise and crossflow planes of the cylinder wake. Emphasis is placed on measurement fidelity and reproducibility: calibration and self-calibration procedures, mapping accuracy, timing, correlation peak metrics, and ensemble convergence are documented to enable error estimation. Spanwise homogeneity checks substantiate the “long-cylinder” approximation in the measurement region and delineate its limits. The effect of cylinder surface roughness is studied by presenting results for both a smooth cylinder, R0, and a cylinder with defined sand roughness, R2. The resulting dataset provides a clean baseline for CFD/LES validation and a reference against which future studies can superimpose controlled roughness, imposed inflow turbulence, or finite-length/end-plate effects. Below are examples of typical time-mean flow fields for both the smooth and rough cylinders. |
| dc.description.sponsorship | Institucionální podpora - ZČU |
| dc.identifier.orcid | Uruba, Václav 0000-0002-7457-9145 |
| dc.identifier.orcid | Duda, Daniel 0000-0003-4883-3127 |
| dc.identifier.uri | http://hdl.handle.net/20.500.14592/104 |
| dc.language.iso | en |
| dc.publisher | ERCOFTAC |
| dc.rights | Creative Commons - Attribution 4.0 International (CC BY 4.0) |
| dc.rights.label | PUB |
| dc.rights.uri | http://creativecommons.org/licenses/by/4.0/ |
| dc.subject | kruhový válec |
| dc.subject | brázda |
| dc.subject | dynamická topologie |
| dc.subject | drsnost povrchu |
| dc.title | Dynamical topology of the near wake behind a slender circular cylinder with variable surface roughness |
| dc.type | dataset |
| local.file.remoteUrl | https://kbwiki.ercoftac.org/w/index.php?title=EXP_1-8 |
| local.files.count | 1 |
| local.files.size | 448931 |
| local.has.files | yes |
| local.subject.translated | circular cylinder |
| local.subject.translated | wake |
| local.subject.translated | dynamical topology |
| local.subject.translated | surface roughness |
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