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Measurement of axial dispersion coefficient in a packed bed using X-ray

Basavaraj, MG and Gupta, GS (2002) Measurement of axial dispersion coefficient in a packed bed using X-ray. In: Materials and Manufacturing Processes, 17 (5). pp. 683-692.

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Dispersion of the liquid in a porous media is of great importance in many areas of engineering and has been studied by several researchers so far. A new experimental method has been developed to measure the dispersion coefficient. X-ray absorption technique provides a better understanding of dispersion that characterizes the mixing phenomenon in the packed beds. This is because the method is non-invasive and also it gives tracer concentration data at every point within the bed. The axial dispersion in a cylindrical bed of non-porous and non-wetting spherical particles has been measured for the flow of water. Aqueous barium chloride solution has been used a as tracer. X-ray images, recorded on a videocassette, have been analyzed using an image processing software to extract the local interstitial velocity and concentration data in the bed. Local dispersion coefficient has been determined with the help of aforementioned data. By using these data, the overall dispersion coefficient in a packed bed can also be estimated.

Item Type: Journal Article
Publication: Materials and Manufacturing Processes
Publisher: Taylor and Francis Group
Additional Information: Copyright of this article belongs to Taylor and Francis Group.
Department/Centre: Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited: 20 Jul 2011 05:54
Last Modified: 20 Jul 2011 05:54
URI: http://eprints.iisc.ac.in/id/eprint/39273

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