NDLI: Particle image velocimetry in viscoelastic fluids and particle interaction effects

Content Provider	Springer Nature Link
Author	Mirsepassi, Alireza Rankin, Derek Dunn
Copyright Year	2013
Abstract	Two main assumptions in laser doppler velocimetry and particle image velocimetry (PIV) are that tracer particles are following the flow faithfully and that they are not interacting hydrodynamically or affecting the flow field. It has been shown, however, that particles in polymeric fluids even in low volumetric concentrations (ϕ < 1 % v/v) can interact profoundly because of the viscoelastic nature of the background fluid, leading even to particle chain or string formation. The objective of this study is to determine how these interactions can affect the flow conclusions drawn from PIV measurements. We chose a highly viscoelastic and shear thinning fluid and confirmed that particle string formation does occur rapidly in a simple shear flow of this fluid. Then, we measured via PIV, the fully developed velocity profile in the mid-plane of a square channel over a wide range of particle loadings 0.005–0.2 % v/v. The measurements confirm that despite the chaining process, there is no discernible effect of particle interaction on PIV velocity measurements.
Starting Page	1
Ending Page	7
Page Count	7
File Format	PDF
ISSN	07234864
Journal	Experiments in Fluids
Volume Number	55
Issue Number	1
e-ISSN	14321114
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2013-12-12
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Engineering Fluid Dynamics Fluid- and Aerodynamics Engineering Thermodynamics, Heat and Mass Transfer
Content Type	Text
Resource Type	Article
Subject	Fluid Flow and Transfer Processes Physics and Astronomy Mechanics of Materials Computational Mechanics

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