Digital image plane holography (DIPH) for two-phase flow diagnostics in multiple planes

A technique for measuring the size and displacement of the disperse phase in two planes of a two-phase flow is presented. Digital image plane holography (DIPH) is used for the simultaneous recording and independent reconstruction of both planes. Each fluid plane is illuminated with two laser sheets...

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Bibliographic Details
Published in:Experiments in fluids 2005-08, Vol.39 (2), p.397-406
Main Authors: PALERO, V, LOBERA, J, ARROYO, M. P
Format: Article
Language:English
Subjects:
Biological and medical applications
Digital
Displacement
Exact sciences and technology
Fluid dynamics
Fluid flow
Fluids
Fundamental areas of phenomenology (including applications)
Image reconstruction
Instrumentation for fluid dynamics
Metrological applications
Multiphase and particle-laden flows
Nonhomogeneous flows
Optics
Physics
Planes
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Summary:A technique for measuring the size and displacement of the disperse phase in two planes of a two-phase flow is presented. Digital image plane holography (DIPH) is used for the simultaneous recording and independent reconstruction of both planes. Each fluid plane is illuminated with two laser sheets propagating in opposite directions. The defocused image fields are holographically recorded at 90 degree , and can be reconstructed either in a defocused or in the best-focused plane. The analysis of the images in a defocused plane provides the sizes, while the cross-correlation of the focused images provides the velocity field, as in a regular particle image velocimetry (PIV) experiment. For air bubbles freely drifting in glycerine, diameters from 50 mu m to 400 mu m and displacements of up to 300 mu m have been measured.
ISSN:0723-4864
1432-1114
DOI:10.1007/s00348-005-0982-8