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Flow rate of a fluid (density = 1000 kg/m3) in a small diameter tube is 800 mm3 /s. The length and the diameter of the tube are 2 m and 0.5 mm, respectively. The pressure drop in 2 m length is equal to 2.0 MPa. The viscosity of the fluid is
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- 0.025 N.s/m2
- 0.012 N.s/m2
- 0.00192 N.s/m2
- 0.00102 N.s/m2
Correct Option: C
| hf = | , f = | = | |||
| 2gD | Re | ρv (d /μ) |
| ∴ hf = | × | |||
| ρVd | 2gD |
| = | ||
| PgD2 |
| V = | = | = | |||
| A | (π /4)d2 | (π /4)(0.5)2 |
= 4.07 m /s
| ∴ hf = | ||
| 1000 × 9.81 × (0.5 × 103)2 |
∴ μ = 0.00192 N3 / m2
