Inter-scale interaction in pipe flows at high Reynolds numbers Articles uri icon

publication date

  • February 2022

start page

  • 1

end page

  • 12

issue

  • 110529

volume

  • 131

International Standard Serial Number (ISSN)

  • 0894-1777

Electronic International Standard Serial Number (EISSN)

  • 1879-2286

abstract

  • Hot-wire measurements of the streamwise velocity are conducted in the large-scale pipe-flow facility CICLoPE in the friction Reynolds number range of 7800 distance, but the strongest opposite effect (with the negative maximum correlations) behaves with the phase difference independent of the outer scaled wall-normal distance. Two-point AM coefficient maps, which give richer spatial information in the outer region than the one-point map, present the Ret independence for AM and opposite effects within the present Ret range. In addition, the relative variation of the two effects in the coexisting wall-normal range is characterised by identifying the maximum gradient of the one-point AM coefficient and the peak-to-peak value of the two-point AM coefficient map

subjects

  • Mechanical Engineering

keywords

  • amplitude modulation; high reynolds number; inter-scale interaction; pipe flow; two-point correlation