Certain aspect of instability of flow in a channel with expansion/contraction

Research output: Chapters, Conference Papers, Creative and Literary Works (RGC: 12, 32, 41, 45)32_Refereed conference paper (with ISBN/ISSN)peer-review

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Author(s)

Detail(s)

Original languageEnglish
Title of host publication7th IUTAM Symposium on Laminar-Turbulent Transition - Proceedings of the 7th IUTAM Symposium on Laminar-Turbulent Transition
Pages501-504
Volume18
Publication statusPublished - 2010
Externally publishedYes

Publication series

NameIUTAM Bookseries
Volume18
ISSN (Print)1875-3507

Conference

Title7th IUTAM Symposium on Laminar-Turbulent Transition
PlaceSweden
CityStockholm
Period23 - 26 June 2009

Abstract

The effect of the beginning of the roughness patch on the evolution of two-dimensional Tollmien-Schlichting waves is considered using theory and direct numerical simulations. The roughness effects may be divided into two elements: (i) change in the average position of the wall and (ii) the roughness shape. The former effect is studied by considering channel with a simple expansion/contraction. It is shown that evolution of base flow towards the plane Poiseuille flow downstream of the step is found to be represented by using slowly-decaying stationary eigenmodes, similar to that for the channel entrance flow. It is also found that the influence of sudden expansion/contraction to the stability of flow persists far downstream. © 2010 Springer Science+Business Media B.V.

Bibliographic Note

Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to lbscholars@cityu.edu.hk.

Citation Format(s)

Certain aspect of instability of flow in a channel with expansion/contraction. / Inasawa, Ayumu; Asai, Masahito; Floryan, Jerzy M.

7th IUTAM Symposium on Laminar-Turbulent Transition - Proceedings of the 7th IUTAM Symposium on Laminar-Turbulent Transition. Vol. 18 2010. p. 501-504 (IUTAM Bookseries; Vol. 18).

Research output: Chapters, Conference Papers, Creative and Literary Works (RGC: 12, 32, 41, 45)32_Refereed conference paper (with ISBN/ISSN)peer-review