Connection between full-lifetime and breakdown of puffs in transitional pipe flows

Mina Nishi; Özgür Ertunç; Antonio Delgado

doi:10.1007/978-90-481-3723-7_94

Connection between full-lifetime and breakdown of puffs in transitional pipe flows

Mina Nishi, Özgür Ertunç, Antonio Delgado

Department of System Design Engineering

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

1 Citation (Scopus)

Abstract

Puff splitting was studied by direct measurement of the full-lifetime (LT_{f ull} ) of transitional structures (puffs) in low Reynolds number pipe flows. During the investigations, a fully developed laminar pipe flow was triggered by an iris diaphragm with pre-defined amplitude and lapse time and the evolution of puffs was monitored by the transients of pressure drop along the pipe and the hot wire anemometry at the pipe exit. Those complementary measurements showed that a single puff favors to breakdown into two or more (splitting) puffs and later into slug-like puffs at Re ≈ 2300, where they are expected to have infinite LT_full.

Original language	English
Title of host publication	7th IUTAM Symposium on Laminar-Turbulent Transition - Proceedings of the 7th IUTAM Symposium on Laminar-Turbulent Transition
Publisher	Springer Verlag
Pages	537-540
Number of pages	4
ISBN (Print)	9789048137220
DOIs	https://doi.org/10.1007/978-90-481-3723-7_94
Publication status	Published - 2010
Event	7th IUTAM Symposium on Laminar-Turbulent Transition - Stockholm, Sweden Duration: 2009 Jun 23 → 2009 Jun 26

Publication series

Name	IUTAM Bookseries
Volume	18
ISSN (Print)	1875-3507

Other

Other	7th IUTAM Symposium on Laminar-Turbulent Transition
Country/Territory	Sweden
City	Stockholm
Period	09/6/23 → 09/6/26

ASJC Scopus subject areas

Civil and Structural Engineering
Automotive Engineering
Aerospace Engineering
Acoustics and Ultrasonics
Mechanical Engineering

Access to Document

10.1007/978-90-481-3723-7_94

Cite this

Connection between full-lifetime and breakdown of puffs in transitional pipe flows. / Nishi, Mina; Ertunç, Özgür; Delgado, Antonio.

7th IUTAM Symposium on Laminar-Turbulent Transition - Proceedings of the 7th IUTAM Symposium on Laminar-Turbulent Transition. Springer Verlag, 2010. p. 537-540 (IUTAM Bookseries; Vol. 18).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Nishi, M, Ertunç, Ö & Delgado, A 2010, Connection between full-lifetime and breakdown of puffs in transitional pipe flows. in 7th IUTAM Symposium on Laminar-Turbulent Transition - Proceedings of the 7th IUTAM Symposium on Laminar-Turbulent Transition. IUTAM Bookseries, vol. 18, Springer Verlag, pp. 537-540, 7th IUTAM Symposium on Laminar-Turbulent Transition, Stockholm, Sweden, 09/6/23. https://doi.org/10.1007/978-90-481-3723-7_94

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AB - Puff splitting was studied by direct measurement of the full-lifetime (LTf ull ) of transitional structures (puffs) in low Reynolds number pipe flows. During the investigations, a fully developed laminar pipe flow was triggered by an iris diaphragm with pre-defined amplitude and lapse time and the evolution of puffs was monitored by the transients of pressure drop along the pipe and the hot wire anemometry at the pipe exit. Those complementary measurements showed that a single puff favors to breakdown into two or more (splitting) puffs and later into slug-like puffs at Re ≈ 2300, where they are expected to have infinite LTfull.

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Connection between full-lifetime and breakdown of puffs in transitional pipe flows

Abstract

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