1. Determine the terminal settling velocity in water of a spherical sand particle of 0.5 mm diameter. The density of the sand is 2.65 x 10 kg/m, and the viscosity of water at 25 C is 1.0 x 10 kg-m'-s. Hint: Stokes law is not appropriate. Start with force balance equation. Check Re number with velocity calculated. 24 C 0< Re, < 2 %3D Re, 18.5 C Re C =0.44 2s Re, < 500 %3D 0.6 500 < Re, <2x10

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1. Determine the terminal settling velocity in water of a spherical sand particle of 0.5 mm
diameter. The density of the sand is 2.65 x 10 kg/m', and the viscosity of water at 25 C is
1.0 x 10 kg-m'-s. Hint: Stokes law is not appropriate. Start with force balance equation.
Check Re number with velocity calculated.
24
C
0 < Re, < 2
Re,
18.5
C
2< Re, < 500
!!
Re0
C = 0.44
500 < Re, <2x10
Transcribed Image Text:1. Determine the terminal settling velocity in water of a spherical sand particle of 0.5 mm diameter. The density of the sand is 2.65 x 10 kg/m', and the viscosity of water at 25 C is 1.0 x 10 kg-m'-s. Hint: Stokes law is not appropriate. Start with force balance equation. Check Re number with velocity calculated. 24 C 0 < Re, < 2 Re, 18.5 C 2< Re, < 500 !! Re0 C = 0.44 500 < Re, <2x10
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