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Near-wall statistics of a turbulent pipe flow at shear Reynolds numbers up to 40 000
| Content Provider | Scilit |
|---|---|
| Author | Willert, Christian E. Soria, Julio Stanislas, Michel Klinner, Joachim Amili, Omid Eisfelder, Michael Cuvier, Christophe Bellani, Gabriele Fiorini, Tommaso Talamelli, Alessandro |
| Copyright Year | 2017 |
| Description | This paper reports on near-wall two-component–two-dimensional (2C–2D) particle image velocimetry (PIV) measurements of a turbulent pipe flow at shear Reynolds numbers up to $Re_{\unicode[STIX]{x1D70F}}=40\,000$ acquired in the CICLoPE facility of the University of Bologna. The 111.5 m long pipe of 900 mm diameter offers a well-established turbulent flow with viscous length scales ranging from $85~\unicode[STIX]{x03BC}\text{m}$ at $Re_{\unicode[STIX]{x1D70F}}=5000$ down to $11~\unicode[STIX]{x03BC}\text{m}$ at $Re_{\unicode[STIX]{x1D70F}}=40\,000$ . These length scales can be resolved with a high-speed PIV camera at image magnification near unity. Statistically converged velocity profiles were determined using multiple sequences of up to 70 000 PIV recordings acquired at sampling rates of 100 Hz up to 10 kHz. Analysis of the velocity statistics shows a well-resolved inner peak of the streamwise velocity fluctuations that grows with increasing Reynolds number and an outer peak that develops and moves away from the inner peak with increasing Reynolds number. |
| Related Links | https://elib.dlr.de/113813/1/JFM-17-RP-0577-Rev1.pdf https://www.cambridge.org/core/services/aop-cambridge-core/content/view/AEB94D52053B3E9E0216662657CB457D/S0022112017004980a.pdf/div-class-title-near-wall-statistics-of-a-turbulent-pipe-flow-at-shear-reynolds-numbers-up-to-40-000-div.pdf |
| ISSN | 00221120 |
| e-ISSN | 14697645 |
| DOI | 10.1017/jfm.2017.498 |
| Journal | Journal of Fluid Mechanics |
| Volume Number | 826 |
| Language | English |
| Publisher | Cambridge University Press (CUP) |
| Publisher Date | 2017-09-10 |
| Access Restriction | Open |
| Subject Keyword | Journal of Fluid Mechanics Fluids and Plasmas Physics Pipe Flow Boundary Layer Turbulent Boundary Layers |
| Content Type | Text |
| Resource Type | Article |
| Subject | Applied Mathematics Mechanics of Materials Condensed Matter Physics Mechanical Engineering |
