Sphericity is the ratio of the surface area of a spherical particle having the same volume as the particle to the surface area of the particle. Which of the following has the maximum value of sphericity ?
Correct answer: A. Sphere
- A. Sphere
- B. Cube
- C. Cylinder (L/D = 1)
- D. Raschig rings
Explanation
Sphericity is at most unity, and only a sphere has the minimum surface area for a given volume. A cube, cylinder, and Raschig ring therefore have lower sphericity values.
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