- Access by Xinjiang University
Coherent structures in transitional pipe flow
Phys. Rev. Fluids 1, 024403 – Published 14 June, 2016
DOI: https://doi.org/10.1103/PhysRevFluids.1.024403
Abstract
Transition to turbulence in pipe flow is investigated experimentally using a temporally resolved dual-plane particle image velocimetry approach, at a Reynolds number of 3440. The flow is analyzed using proper orthogonal decomposition and it is shown that the flow can be divided into two regions: a pseudolaminar region governed by the presence of azimuthally steady traveling waves, and turbulent slugs. The evolution of the structures within the slugs is identified by using the temporally resolved data along with the dual-plane velocity field. These structures are shown to be remarkably similar to the large-scale motions found in fully turbulent flows, with a streamwise and spatiotemporal extent about four pipe radii. The transition between structures is characterized by the detachment and decay of an old structure and the initiation of a new structure at the wall.
Physics Subject Headings (PhySH)
Article Text
References (18)
- M. Chantry, A. P. Willis, and R. R. Kerswell, Genesis of Streamwise-Localized Solutions from Globally Periodic Traveling Waves in Pipe Flow, Phys. Rev. Lett. 112, 164501 (2014).
- S. Bottin, F. Daviaud, P. Manneville, and O. Dauchot, Discontinuous transition to spatiotemporal intermittency in plane Couette flow, Europhys. Lett. 43, 171 (1998).
- X. Wu, P. Moin, R. J. Adrian, and J. R. Baltzer, Osborne Reynolds pipe flow: Direct simulation from laminar through gradual transition to fully developed turbulence, Proc. Natl. Acad. Sci. USA 112, 7920 (2015).
- H. Faisst and B. Eckhardt, Traveling Waves in Pipe Flow, Phys. Rev. Lett. 91, 224502 (2003).
- O. Ozcakir, S. Tanveer, P. Hall, and E. A. Overman, Travelling wave states in pipe flow, J. Fluid Mech. 791, 284 (2016).
- F. Waleffe, Three-Dimensional Coherent States in Plane Shear Flows, Phys. Rev. Lett. 81, 4140 (1998).
- H. Wedin and R. R. Kerswell, Exact coherent structures in pipe flow: Traveling wave solutions, J. Fluid Mech. 508, 333 (2004).
- T. M. Schneider, B. Eckhardt, and J. A. Yorke, Turbulence Transition and the Edge of Chaos in Pipe Flow, Phys. Rev. Lett. 99, 034502 (2007).
- D. J. C. Dennis and F. M. Sogaro, Distinct Organizational States of Fully Developed Turbulent Pipe Flow, Phys. Rev. Lett. 113, 234501 (2014).
- J. R. Baltzer, R. J. Adrian, and X. Wu, Structural organization of large and very large scales in turbulent pipe flow simulation, J. Fluid Mech. 720, 236 (2013).
- L. H. O. Hellström and A. J. Smits, The energetic motions in turbulent pipe flow, Phys. Fluids 26, 125102 (2014).
- L. H. O. Hellström, B. Ganapathisubramani, and A. J. Smits, The evolution of large-scale motions in turbulent pipe flow, J. Fluid Mech. 779, 701 (2015).
- R. J. Adrian, C. D. Meinhart, and C. D. Tomkins, Vortex organization in the outer region of the turbulent boundary layer, J. Fluid Mech. 422, 1 (2000).
- I. J. Wygnanski and F. H. Champagne, On transition in a pipe. Part 1. The origin of puffs and slugs and the flow in a turbulent slug, J. Fluid Mech. 59, 281 (1973).
- T. Mullin, Experimental studies of transition to turbulence in a pipe, Annu. Rev. Fluid Mech. 43, 1 (2011).
- L. H. O. Hellström, A. Sinha, and A. J. Smits, Visualizing the very-large-scale motions in turbulent pipe flow, Phys. Fluids 23, 011703 (2011).
- L. H. O. Hellström, I. Marusic, and A. J. Smits, Self-similarity of the large-scale motions in turbulent pipe flow, J. Fluid Mech. 792, R1 (2016).
- M. N. Glauser and W. K. George, in Advances in Turbulence (Springer, Berlin, 1987), pp. 357–366.