PULSATING FLOW IN A PIPE.

L. Shemer, Israel J Wygnanski, E. Kit

Research output: Contribution to journalArticle

90 Citations (Scopus)

Abstract

Turbulent and laminar pulsating flows in a straight smooth pipe are compared at identical frequencies and Reynolds numbers. Velocities at the exit plane of the pipe and pressure drop along the pipe were measured simultaneously. The introduction of the periodic surging had no significant effect on the time-averaged quantities, regardless of the flow regime. The time-dependent components at the forcing frequency, represented by a radial distribution of amplitudes and phases, are qualitatively different in laminar and turbulent flows. A normalization procedure is proposed which relates phase-locked turbulent flow parameters in unsteady flow to similar time-averaged quantities. A simple eddy-viscosity model described by a complex function can account for 'memory' of turbulence and explain the different phase distribution in laminar and turbulent flows.

Original languageEnglish (US)
Pages (from-to)313-337
Number of pages25
JournalJournal of Fluid Mechanics
Volume153
StatePublished - Apr 1985
Externally publishedYes

Fingerprint

unsteady flow
Laminar flow
turbulent flow
Turbulent flow
Pipe
laminar flow
eddy viscosity
Unsteady flow
pressure drop
radial distribution
Pressure drop
Reynolds number
Turbulence
turbulence
Viscosity
Data storage equipment

ASJC Scopus subject areas

  • Computational Mechanics
  • Mechanics of Materials
  • Physics and Astronomy(all)
  • Condensed Matter Physics

Cite this

Shemer, L., Wygnanski, I. J., & Kit, E. (1985). PULSATING FLOW IN A PIPE. Journal of Fluid Mechanics, 153, 313-337.

PULSATING FLOW IN A PIPE. / Shemer, L.; Wygnanski, Israel J; Kit, E.

In: Journal of Fluid Mechanics, Vol. 153, 04.1985, p. 313-337.

Research output: Contribution to journalArticle

Shemer, L, Wygnanski, IJ & Kit, E 1985, 'PULSATING FLOW IN A PIPE.', Journal of Fluid Mechanics, vol. 153, pp. 313-337.
Shemer, L. ; Wygnanski, Israel J ; Kit, E. / PULSATING FLOW IN A PIPE. In: Journal of Fluid Mechanics. 1985 ; Vol. 153. pp. 313-337.
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