An experimental investigation regarding the laminar to turbulent flow transition in helically coiled pipes

Andrea Cioncolini*, Lorenzo Santini

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

148 Scopus citations

Abstract

An experimental study was carried out to investigate the transition from laminar to turbulent flow in helically coiled pipes. Twelve coils have been tested, with ratios of coil diameter to tube diameter ranging from 6.9 to 369, and the interaction between turbulence emergence and coil curvature has been analyzed from direct observation of the experimental friction factor profiles. The experimental data compare favorably with existing results and reveal new features that apparently were not observed in previous research.

Original languageEnglish
Pages (from-to)367-380
Number of pages14
JournalExperimental Thermal and Fluid Science
Volume30
Issue number4
DOIs
StatePublished - Mar 2006
Externally publishedYes

Keywords

  • Curvature effect
  • Curved ducts
  • Helically coiled pipes
  • Laminar to turbulent flow transition
  • Turbulence emergence

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