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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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Related in: MedlinePlus

Measured sizes for many different coalescence events plotted in terms of variables R                  a = r                  m/r                  s and R                  b = r                  l/r                  s. The solid line shows the cubic mass conservation relation ( =  + ). The error bars correspond to a standard deviation in the radius measurements.
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fig4: Measured sizes for many different coalescence events plotted in terms of variables R a = r m/r s and R b = r l/r s. The solid line shows the cubic mass conservation relation ( = + ). The error bars correspond to a standard deviation in the radius measurements.

Mentions: Coalescence events were recorded for microbubbles with radii in the range 10–300 µm for different gases (Ar, He and air), different liquid temperatures (between 290 K and 330 K) and different oil–water interface curvatures. Radius values were extracted from the images using Image-ProPlus software (MediaCybernetics) and the accuracy was determined by the spatial resolution and, for large bubbles, by deviations from sphericity. The overall trend is shown in Fig. 4 ▶ (open circles) in terms of the variables R a = r m/r s and R b = r l/r s. The best fit (solid line), independent of the gas, liquid temperature and interface curvature, corresponds to the above cubic form, = + (Bolina & Parreira, 2000 ▶).


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

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

Measured sizes for many different coalescence events plotted in terms of variables R                  a = r                  m/r                  s and R                  b = r                  l/r                  s. The solid line shows the cubic mass conservation relation ( =  + ). The error bars correspond to a standard deviation in the radius measurements.
© Copyright Policy - open-access
Related In: Results  -  Collection

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

fig4: Measured sizes for many different coalescence events plotted in terms of variables R a = r m/r s and R b = r l/r s. The solid line shows the cubic mass conservation relation ( = + ). The error bars correspond to a standard deviation in the radius measurements.
Mentions: Coalescence events were recorded for microbubbles with radii in the range 10–300 µm for different gases (Ar, He and air), different liquid temperatures (between 290 K and 330 K) and different oil–water interface curvatures. Radius values were extracted from the images using Image-ProPlus software (MediaCybernetics) and the accuracy was determined by the spatial resolution and, for large bubbles, by deviations from sphericity. The overall trend is shown in Fig. 4 ▶ (open circles) in terms of the variables R a = r m/r s and R b = r l/r s. The best fit (solid line), independent of the gas, liquid temperature and interface curvature, corresponds to the above cubic form, = + (Bolina & Parreira, 2000 ▶).

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
Related in: MedlinePlus