On the use of the Reynolds decomposition in the intermittent region of turbulent boundary layers
In the analysis of velocity fields in turbulent boundary layers, the traditional Reynolds decomposition is universally employed to calculate the fluctuating component of streamwise velocity. Here, we demonstrate the perils of such a determination of the fluctuating velocity in the context of structu...
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| Veröffentlicht in: | Journal of fluid mechanics 2016-05, Vol.794, p.5-16 |
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| container_title | Journal of fluid mechanics |
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| creator | Kwon, Y. S. Hutchins, N. Monty, J. P. |
| description | In the analysis of velocity fields in turbulent boundary layers, the traditional Reynolds decomposition is universally employed to calculate the fluctuating component of streamwise velocity. Here, we demonstrate the perils of such a determination of the fluctuating velocity in the context of structural analysis of turbulence when applied in the outer region where the flow is intermittently turbulent at a given wall distance. A new decomposition is postulated that ensures non-turbulent regions in the flow do not contaminate the fluctuating velocity components in the turbulent regions. Through this new decomposition, some of the typical statistics concerning the scale and structure of turbulent boundary layers are revisited. |
| doi_str_mv | 10.1017/jfm.2016.161 |
| format | Article |
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| ispartof | Journal of fluid mechanics, 2016-05, Vol.794, p.5-16 |
| issn | 0022-1120 1469-7645 |
| language | eng |
| recordid | cdi_proquest_journals_1884333006 |
| source | Cambridge Journals |
| subjects | Boundary layer Boundary layers Decomposition Fluid mechanics Reynolds number Structural analysis Turbulent flow Velocity |
| title | On the use of the Reynolds decomposition in the intermittent region of turbulent boundary layers |
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