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A coherent synchrotron X-ray microradiology investigation of bubble and droplet coalescence.

Weon BM, Je JH, Hwu Y, Margaritondo G - J Synchrotron Radiat (2008)

Bottom Line: A quantitative application of microradiology with coherent X-rays to the real-time study of microbubble and microdroplet coalescence phenomena, with specific emphasis on the size relations in three-body events, is presented.The results illustrate the remarkable effectiveness of coherent X-ray imaging in delineating interfaces in multiphase systems, in accurately measuring their geometric properties and in monitoring their dynamics.

View Article: PubMed Central - HTML - PubMed

Affiliation: X-ray Imaging Center, Department of Materials Science and Engineering, Pohang University of Science and Technology, Pohang 790-784, Korea.

ABSTRACT
A quantitative application of microradiology with coherent X-rays to the real-time study of microbubble and microdroplet coalescence phenomena, with specific emphasis on the size relations in three-body events, is presented. The results illustrate the remarkable effectiveness of coherent X-ray imaging in delineating interfaces in multiphase systems, in accurately measuring their geometric properties and in monitoring their dynamics.

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Experimental set-up for the observation of coalescence phenomena for gas of microbubbles and mercury microdroplets. The capillary properties of the water–oil interface in a plastic container countered the gravity effects on the microbubbles.
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fig1: Experimental set-up for the observation of coalescence phenomena for gas of microbubbles and mercury microdroplets. The capillary properties of the water–oil interface in a plastic container countered the gravity effects on the microbubbles.

Mentions: We specifically analyzed coalescence events involving gas bubbles or mercury droplets. For bubbles, we exploited the capillary properties of the water–oil interface in a plastic container (10 × 10 × 100 mm) (Fig. 1 ▶) to largely suppress the influence of gravity and of the liquid. After injection into water, the microbubbles are confined to move at the water–oil interface; they shift towards its center-top because of the net force resulting from the (vertical) gravitation buoyancy combined with the adhesion force (perpendicular to the interface). At the center-top of the interface, they coalesce together and the events are recorded with sequential real-time microradiographs.


A coherent synchrotron X-ray microradiology investigation of bubble and droplet coalescence.

Weon BM, Je JH, Hwu Y, Margaritondo G - J Synchrotron Radiat (2008)

Experimental set-up for the observation of coalescence phenomena for gas of microbubbles and mercury microdroplets. The capillary properties of the water–oil interface in a plastic container countered the gravity effects on the microbubbles.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC2573953&req=5

fig1: Experimental set-up for the observation of coalescence phenomena for gas of microbubbles and mercury microdroplets. The capillary properties of the water–oil interface in a plastic container countered the gravity effects on the microbubbles.
Mentions: We specifically analyzed coalescence events involving gas bubbles or mercury droplets. For bubbles, we exploited the capillary properties of the water–oil interface in a plastic container (10 × 10 × 100 mm) (Fig. 1 ▶) to largely suppress the influence of gravity and of the liquid. After injection into water, the microbubbles are confined to move at the water–oil interface; they shift towards its center-top because of the net force resulting from the (vertical) gravitation buoyancy combined with the adhesion force (perpendicular to the interface). At the center-top of the interface, they coalesce together and the events are recorded with sequential real-time microradiographs.

Bottom Line: A quantitative application of microradiology with coherent X-rays to the real-time study of microbubble and microdroplet coalescence phenomena, with specific emphasis on the size relations in three-body events, is presented.The results illustrate the remarkable effectiveness of coherent X-ray imaging in delineating interfaces in multiphase systems, in accurately measuring their geometric properties and in monitoring their dynamics.

View Article: PubMed Central - HTML - PubMed

Affiliation: X-ray Imaging Center, Department of Materials Science and Engineering, Pohang University of Science and Technology, Pohang 790-784, Korea.

ABSTRACT
A quantitative application of microradiology with coherent X-rays to the real-time study of microbubble and microdroplet coalescence phenomena, with specific emphasis on the size relations in three-body events, is presented. The results illustrate the remarkable effectiveness of coherent X-ray imaging in delineating interfaces in multiphase systems, in accurately measuring their geometric properties and in monitoring their dynamics.

Show MeSH