Further observations on the mean velocity distribution in fully developed pipe flow

1732 33 47256 2 2369000 document 47256 lightbox.jpg image/png ed459215720c8b6da683c4bf16ea90b7 MD5 58379 2020-05-04 23:39:05 https://vuir.vu.edu.au/1732/2/lightbox.jpg 1732 2 2 image/png other Thumbnails conversion from text to thumbnail_lightbox en staffonly

lightbox.jpg

preview.jpg

medium.jpg

small.jpg

http://eprints.org/relation/isVersionOf https://vuir.vu.edu.au/id/dark_document/47247 http://eprints.org/relation/isVolatileVersionOf https://vuir.vu.edu.au/id/dark_document/47247 http://eprints.org/relation/issmallThumbnailVersionOf https://vuir.vu.edu.au/id/dark_document/47247 archive 293 disk0/00/00/17/32 2009-02-15 12:09:50 2021-08-27 07:42:04 2009-02-15 12:09:50 article show McKeon B. J McKeon, B. J Li Jun-de Li, J Jiang W Jiang, W Morrison J. F Morrison, J. F Smits A. J Smits, A. J Further observations on the mean velocity distribution in fully developed pipe flow pub 290000 cesare Reynolds number, velocity gradient, equation, measurement, pipe The measurements by Zagarola & Smits (1998) of mean velocity profiles in fully developed turbulent pipe flow are repeated using a smaller Pitot probe to reduce the uncertainties due to velocity gradient corrections. A new static pressure correction (McKeon & Smits 2002) is used in analysing all data and leads to significant differences from the Zagarola & Smits conclusions. The results confirm the presence of a power-law region near the wall and, for Reynolds numbers greater than $230\,{\times}\,10^3$ ($R^+\,{>}\,5\,{\times}\,10^3$), a logarithmic region further out, but the limits of these regions and some of the constants differ from those reported by Zagarola & Smits. In particular, the log law is found for $600\,{<}\, y^+\,{<}\,0.12R^+$ (instead of $600\,{<}\,y^+\,{<}\,0.07R^+$), and the von Kármán constant $\kappa$, the additive constant $B$ for the log law using inner flow scaling, and the additive constant $B^*$ for the log law using outer scaling are found to be $0.421 \pm 0.002$, $5.60 \pm 0.08 $ and $1.20 \pm 0.10$, respectively, with 95% confidence level (compared with $0.436 \pm 0.002$, $6.15 \pm 0.08$, and $1.51 \pm 0.03$ found by Zagarola & Smits). The data also confirm that the pipe flow data for Re$_D\,{\le}\,13.6\,{\times}\,10^6$ (as a minimum) are not affected by surface roughness. 2004-02-25 published Cambridge University Press doi:10.1017/S0022112003007304 http://dx.doi.org/10.1017/S0022112003007304 47247 2 2368982 dark_document 47247 Li Jun-De.pdf application/pdf 37bbf1fd1f44f925a4dc3a7bfa3dc94c MD5 72197 2020-05-04 23:28:41 1732 1 1 application/pdf text Submission & Permission Form en staffonly

Li Jun-De.pdf

other none Journal of Fluid Mechanics 501 135-147 TRUE 0022-1120 FALSE 250 2-s2.0-1842428735 2023-07-02 04:01:04