The importance of turbulence macroscale in determining the drag coefficient of spheres
β Scribed by R.S. Neve
- Publisher
- Elsevier Science
- Year
- 1986
- Tongue
- English
- Weight
- 899 KB
- Volume
- 7
- Category
- Article
- ISSN
- 0142-727X
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## 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 β30 ft./sec.^2^ and for relative intensities of up to 45%. Th
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 wer