A general formulation for the decay of swirling motion along a straight pipe

Ching Man Yu, O. Kitoh

Research output: Journal article publicationJournal articleAcademic researchpeer-review

21 Citations (Scopus)


This paper describes an analytical approach, based on the conservation of angular momentum flux, to predict the decay of swirling motion due to frictional effects along a straight duct. A combined forced vortex and shear-type velocity profiles were used and the analysis could be applicable to any types of swirling flow. Good agreement with measurements in a straight pipe with different level of inlet swirl intensities (Kitoh O.; J. Fluid Mechanics, 1991) can be obtained with the approximate solution. The present formulation can also demonstrate that the swirling motion along a straight pipe does not always decay exponentially but depending on inlet conditions and the variation of friction coefficient with downstream distance. © 1994.
Original languageEnglish
Pages (from-to)719-728
Number of pages10
JournalInternational Communications in Heat and Mass Transfer
Issue number5
Publication statusPublished - 1 Jan 1994
Externally publishedYes

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Chemical Engineering(all)
  • Condensed Matter Physics


Dive into the research topics of 'A general formulation for the decay of swirling motion along a straight pipe'. Together they form a unique fingerprint.

Cite this