25-27 November 2015
National Centre for Synchrotron Science
Australia/Melbourne timezone

Improved Absorption and Phase Contrast PIV Via Multi-Source Imaging Techniques

27 Nov 2015, 13:30
National Centre for Synchrotron Science

National Centre for Synchrotron Science

Australian Synchrotron 800 Blackburn Road Clayton VIC 3168
Board: IM-04
Poster Imaging Poster Session 2


Mr George Goonan (Monash University)


Previous research in the field of Particle Image Velocimetry (PIV) has highlighted the need for high spatio-temporal resolution [[1]] as well as a distinction between static and dynamic imaging optimization [2]. Traditional single-source imaging systems optimized for small spot sizes are constrained by physical limitations, such as maximum anode power density. By utilising multiple sources with small spot sizes, anode power density is maintained while increasing overall brightness. The resultant image (see Figure 1), while not necessarily suitable for static imaging, provides increased information density for more accurate PIV analysis. Presented here is the preliminary investigation into multi-source PIV imaging regimes. Two forms of this technology are displayed; Aperture-type applications (see Figure 1), and the characteristically equivalent flat-panel array source applications. Through computational simulations experimentally validated using a liquid metal jet source, we demonstrate this novel technology’s capability for significantly increased PIV accuracy with reduced source luminosity. We further demonstrate that these properties can be greatly enhanced by judicious selection of source location and system geometry. ![Aperture-type Multi-Source Imaging. The overlapping images, whilst creating blur for static imaging, increases information density for dynamic imaging. Source credit: Rajeev Samarage][1] [1]: http://s30.postimg.org/ilz3fzhfl/MSPCX_small.png [[1]] S. Dubsky, S. B. Hooper, K. K. W. Siu, and A. Fouras: J. R. Soc. Interface 9 (2012) 2213. [2] I. Ng, D. M. Paganin and A. Fouras, J. Appl. Phys., vol. 112, no. 074701, pp. 1-11, 2012.
Keywords PIV; Multi-Source Imaging; PCI; X-Ray Absorption Imaging;

Primary author

Mr George Goonan (Monash University)


Prof. Andreas Fouras (Monash University) Mr Richard Carnibella (Monash University) Dr Stephen Dubsky (Monash University)

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