Experimental study of gravity-driven film flow of non-Newtonian fluids

Haeri, S. and Hashemabadi, S. H. (2008) Experimental study of gravity-driven film flow of non-Newtonian fluids Chemical Engineering Communications, 196, (5), pp. 519-529. (doi:10.1080/00986440802484481).


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In this research the problem of a thin layer of a power law liquid falling down an inclined plate was studied experimentally. Three different carboxymethyl cellulose (CMC) solution concentrations (1.1%, 1.5%, and 2%), which are extensively used in industry, have been selected as the operating fluid, and their rheology, surface tension, and contact angle have been determined. Dynamics of the falling film has been studied by image acquisition techniques, and by using image processing methods the velocity of falling film, film thickness, and the shape of the falling film have been investigated. The inclined plate with different inclination angles (0 < < ?/2), and nonidentical surfaces (ceramic, aluminum, and glass) were used to study the effect of inclination, rheological properties, and contact angle on the vital parameters mentioned earlier. These variables are embedded in dimensionless groups, Weber (We), Reynolds (Re), and Froude (Fr) numbers, and some correlations were devised to relate dimensionless velocity distribution parameters and film thickness to these dimensionless groups.

Item Type: Article
Digital Object Identifier (DOI): doi:10.1080/00986440802484481
ISSNs: 0098-6445 (print)
Keywords: film flows, gravity-driven, image acquisition, image processing, inclined surface, non-newtonian
Organisations: Faculty of Engineering and the Environment
ePrint ID: 344619
Date :
Date Event
11 December 2008Published
Date Deposited: 29 Oct 2012 10:22
Last Modified: 17 Apr 2017 16:26
Further Information:Google Scholar
URI: http://eprints.soton.ac.uk/id/eprint/344619

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