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Direct numerical simulation of turbulent channel flow up to $Re_\tau \approx 5200$
| Content Provider | Semantic Scholar |
|---|---|
| Author | Lee, Myoungkyu Moser, Robert D. |
| Copyright Year | 2014 |
| Abstract | A direct numerical simulation of incompressible channel flow at $Re_\tau$ = 5186 has been performed, and the flow exhibits a number of the characteristics of high Reynolds number wall-bounded turbulent flows. For example, a region where the mean velocity has a logarithmic variation is observed, with von Karman constant $\kappa = 0.384 \pm 0.004$. There is also a logarithmic dependence of the variance of the spanwise velocity component, though not the streamwise component. A distinct separation of scales exists between the large outer-layer structures and small inner-layer structures. At intermediate distances from the wall, the one-dimensional spectrum of the streamwise velocity fluctuation in both the streamwise and spanwise directions exhibits $k^{-1}$ dependence over a short range in $k$. Further, consistent with previous experimental observations, when these spectra are multiplied by $k$ (premultiplied spectra), they have a bi-modal structure with local peaks located at wavenumbers on either side of the $k^{-1}$ range. |
| Starting Page | 395 |
| Ending Page | 415 |
| Page Count | 21 |
| File Format | PDF HTM / HTML |
| DOI | 10.1017/jfm.2015.268 |
| Alternate Webpage(s) | https://arxiv.org/pdf/1410.7809v2.pdf |
| Alternate Webpage(s) | https://arxiv.org/pdf/1410.7809.pdf |
| Alternate Webpage(s) | https://doi.org/10.1017/jfm.2015.268 |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
