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Upper and lower bounds on the drag coefficient of a sphere in an Ellis model fluid

โœ Scribed by Scott W. Hopke; John C. Slattery

Publisher
American Institute of Chemical Engineers
Year
1970
Tongue
English
Weight
562 KB
Volume
16
Category
Article
ISSN
0001-1541

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โœฆ Synopsis

Hill's extremum principles are not directly applicable to an Ellis model fluid. A method of adapting Hill's principles to the Ellis model was developed and used to calculate upper and lower bounds on the drag coefficient for a sphere moving slowly through such a fluid. Amilable experimental data were compared with the averagd of the upper and lower bounds. Agreement was poor with Slattery's data and good with Turian's data. Some reasons to suspect Slattery'r data have been pointed out.

๐Ÿ“œ SIMILAR VOLUMES

The drag coefficients of single spheres
The drag coefficients of single spheres moving in steady and accelerated motion in a turbulent fluid
โœ L. B. Torobin; W. H. Gauvin ๐Ÿ“‚ Article ๐Ÿ“… 1961 ๐Ÿ› American Institute of Chemical Engineers ๐ŸŒ English โš– 643 KB

## Abstract Drag coefficients of aerodynamically smooth spheres having a density variation of from 0.252 to 1.91 g./cc. and a diameter variation from 1.56 to 3.21 mm. were obtained for acceleration rates varying from 103.5 ft./sec.^2^ to โ€30 ft./sec.^2^ and for relative intensities of up to 45%. Th