Dynamic stability of a submerged, free-hanging riser conveying fluid

G. L. Kuiper, A. V. Metrikine

Research output: Contribution to journalArticleScientificpeer-review

56 Citations (Scopus)

Abstract

Studying the stability of a vertically suspended, fully submerged pipe conveying water (water riser), researchers have found a contradiction between theoretical predictions and experiments. Theory predicts instability at small velocities of convection, while experiments did not show such instability. The only attempt to explain this contradiction was made by Païdoussis, suggesting that the theoretical prediction is wrong because of an improper description of the negative pressurisation of water at the inlet of the pipe. In this paper, it is shown theoretically that the negative pressurisation influences the stability only slightly and cannot explain the contradiction. What can explain it, is the hydrodynamic drag caused by surrounding water, which is shown to be an essential stabilising factor.

Original languageEnglish
Pages (from-to)1051-1065
Number of pages15
JournalJournal of Sound and Vibration
Volume280
Issue number3-5
DOIs
Publication statusPublished - 23 Feb 2005

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