Experimental study on high Reynolds number pipe flow

A theoretical study is made of the stability of pipe flow with superimposed rigid rotation to finite-amplitude disturbances at high Reynolds number. The non-axisymmetric mode that requires the least amount of rotation for linear instability is considered. An amplitude expansion is developed close to the corresponding neutral stability curve; the appropriate Landau constant is calculated. It is demonstrated that the flow exhibits nonlinear subcritical instability, the nonlinear effects being particularly strong owing to the large magnitude of the Landau constant. These findings support the view that a small amount of extraneous rotation could play a significant role in the transition to turbulence of pipe flow.

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Response to “Comment on ‘Experimental study of skin friction drag reduction on superhydrophobic flat plates in high Reynolds number boundary layer flow’” [Phys. Fluid 25, 079101 (2013)]

Physics of Fluids ◽

10.1063/1.4816363 ◽

2013 ◽

Vol 25 (7) ◽

pp. 079102 ◽

Cited By ~ 3

Author(s):

Elias Aljallis ◽

Mohammad Amin Sarshar ◽

Raju Datla ◽

Vinod Sikka ◽

Andrew Jones ◽

...

Keyword(s):

Boundary Layer ◽

Experimental Study ◽

Reynolds Number ◽

Boundary Layer Flow ◽

High Reynolds Number ◽

Friction Drag ◽

Flat Plates ◽

Layer Flow ◽

High Reynolds ◽

Friction Drag Reduction

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Effects of targeted wall geometries on response of turbulent pipe flow at high Reynolds number

International Journal of Heat and Fluid Flow ◽

10.1016/j.ijheatfluidflow.2021.108882 ◽

2021 ◽

Vol 92 ◽

pp. 108882

Author(s):

Mehran Masoumifar ◽

Suyash Verma ◽

Arman Hemmati

Keyword(s):

Reynolds Number ◽

Pipe Flow ◽

High Reynolds Number ◽

Turbulent Pipe Flow ◽

High Reynolds

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1502 Universality of the velocity profile in the high Reynolds number turbulent pipe flow

The Proceedings of the Fluids engineering conference ◽

10.1299/jsmefed.2015._1502-1_ ◽

2015 ◽

Vol 2015 (0) ◽

pp. _1502-1_-_1502-2_

Author(s):

Yuki WADA ◽

Noriyuki FURUICHI ◽

Yoshiya TERAO ◽

Yoshiyuki TSUJI

Keyword(s):

Reynolds Number ◽

Velocity Profile ◽

Pipe Flow ◽

High Reynolds Number ◽

Turbulent Pipe Flow ◽

High Reynolds

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The stability of developing pipe flow at high Reynolds number and the existence of nonlinear neutral centre modes

Journal of Fluid Mechanics ◽

10.1017/jfm.2011.302 ◽

2011 ◽

Vol 684 ◽

pp. 284-315 ◽

Cited By ~ 5

Author(s):

Andrew G. Walton

Keyword(s):

Reynolds Number ◽

Pipe Flow ◽

High Reynolds Number ◽

Pipe Wall ◽

Fluid Velocity ◽

Nonlinear Effects ◽

Neutral Curve ◽

High Reynolds ◽

The Stability ◽

Axisymmetric Disturbances

AbstractThe high-Reynolds-number stability of unsteady pipe flow to axisymmetric disturbances is studied using asymptotic analysis. It is shown that as the disturbance amplitude is increased, nonlinear effects first become significant within the critical layer, which moves away from the pipe wall as a result. It is found that the flow stabilizes once the basic profile has become sufficiently fully developed. By tracing the nonlinear neutral curve back to earlier times, it is found that in addition to the wall mode, which arises from a classical upper branch linear stability analysis, there also exists a nonlinear neutral centre mode, governed primarily by inviscid dynamics. The centre mode problem is solved numerically and the results show the existence of a concentrated region of vorticity centred on or close to the pipe axis and propagating downstream at almost the maximum fluid velocity. The connection between this structure and the puffs and slugs of vorticity observed in experiments is discussed.

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