Near-wall behaviour of statistical properties in turbulent flows

✍ Scribed by M. Fischer; J. Jovanović; F. Durst

• Publisher: Elsevier Science
• Year: 2000
• Tongue: English
• Weight: 329 KB
• Volume: 21
• Category: Article
• ISSN: 0142-727X
• DOI: 10.1016/s0142-727x(00)00034-5

✦ Synopsis

Many technically relevant ¯ows are wall-bounded ¯ows at high Reynolds numbers. The knowledge of the near-wall behaviour of turbulence is important for the correct modelling of these ¯ows. The in¯uence of the Reynolds number on turbulence quantities results from the imposed boundary conditions at the edge of a boundary layer or on the axis of a channel or a pipe ¯ow. This has often been assumed not to aect the near-wall region. However, experimental and numerical results show a Reynolds number dependence of turbulence intensity very close to the wall. In this work the low-Reynolds number eects in turbulent wall-bounded ¯ows were investigated experimentally using the LDA measuring technique. A new method is explained how to eliminate the in-¯uence of the limited spatial resolution of the LDA measuring technique.