Experimental measurement of laminar axisymmetric flow through confined annular geometries with sudden inward expansion

Afshin Goharzadeh, Peter Rodgers

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

In this paper separated and reattaching laminar flows produced by a sudden inward expansion within confined annular geometries are experimentally studied. Using Particle Image Velocimetry (PIV), combined with refractive index matching, the structure of fluid flow at the expansion region was investigated. Detailed measurement of the velocities, the reattachment length (Lr) and the relative eddy intensity (î) are obtained for two different expansion ratios of ε = 1.4 and 1.6. The measured variation of the reattachment length as a function of Reynolds number (50 < Re < 600) was found to be non-linear for these expansion ratios. Eddy intensity was found to depend strongly on both Reynolds number and expansion ratio, with the relationship between ζ and Re being non-linear. Overall corresponding numerical predictions obtained by Nag & Datta [1] are in good agreement with the measurement results presented.

Original languageBritish English
Title of host publication2008 Proceedings of ASME International Mechanical Engineering Congress and Exposition, IMECE 2008
Pages375-378
Number of pages4
EditionPART A
DOIs
StatePublished - 2009
Event2008 ASME International Mechanical Engineering Congress and Exposition, IMECE 2008 - Boston, MA, United States
Duration: 31 Oct 20086 Nov 2008

Publication series

NameASME International Mechanical Engineering Congress and Exposition, Proceedings
NumberPART A
Volume10

Conference

Conference2008 ASME International Mechanical Engineering Congress and Exposition, IMECE 2008
Country/TerritoryUnited States
CityBoston, MA
Period31/10/086/11/08

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