Laminar Sinusoidal and Pulsatile Flows in a Curved Pipe

Two components of pulsatile flow (i.e. steady flow and sinusoidal flow) are studied separately by particle image velocimetry (PIV).The topology of the secondary flow structures, axial vorticities and transverse strain rates in a pure sinusoidal flow and also in a steady flow are compared to those in...

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Bibliographic Details
Published inJournal of applied fluid mechanics Vol. 4; no. 3; pp. 21 - 26
Main Authors Jarrahi, M, Castelain, C, Peerhossaini, H
Format Journal Article
LanguageEnglish
Published Isfahan Isfahan University of Technology 01.07.2011
Subjects
Curved pipe
Diameters
Equilibrium flow
Fluid dynamics
Fluid flow
Helical flow
Laminar flow
Mixers
Mixing
Particle image velocimetry
Pipes
PIV
Pulsatile flow
Reynolds number
Secondary flow
Sinusoidal flow
Steady flow
Topology
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Summary:Two components of pulsatile flow (i.e. steady flow and sinusoidal flow) are studied separately by particle image velocimetry (PIV).The topology of the secondary flow structures, axial vorticities and transverse strain rates in a pure sinusoidal flow and also in a steady flow are compared to those in a pulsatile flow through a curved pipe. The experimental setup provides different conditions for the flow entering a 90° circular curved pipe of diameter 0.04 m and curvature radius 0.22m. Pulsatile flows were studied for two stationary Reynolds numbers, Rest=420 and Rest=600. The frequency parameters =10.26 and =14.51 were chosen to study pure sinusoidal flow (=r0)0.5). Pulsating conditions were obtained by combining steady and sinusoidal flow for (Rest=600, =10.26), (Rest=600, =14.51) and (Rest=420, =14.51). The results of this study contribute to a better understanding of mixing in a developing laminar flow through curved pipes (helical and twisted/chaotic mixers) in steady state flow, pure sinusoidal flow and pulsatile flow.
ISSN:1735-3572
1735-3645
1735-3645
DOI:10.36884/jafm.4.03.11930