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Water flows through a tube of diameter 25 mm at an average velocity of 1.0 m/s. The properties of water are ρ = 1000 kg/m³, μ= 7.25 × 104 Ns/m², k = 0.625 W/mK, Pr = 4.85. Using Nu = 0.023 Re0.8 Pr0.4, the convective heat transfer coefficient (inW/m²K) is _______
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= 4613.66 m²K W -
= 4613.66 W m²K -
= 4536 m²K W -
= 4536 W m²K
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Correct Option: B
| Re = | ||
| μ |
| = | ||
| 7.25 × 10-4 |
= 34482.75
Pr = 4.85
Nu = 0.023 Re0.8 Pr0.4.
Nu = .0.23 × (34482.758)0.8 (4.85)0.4.
= 184.546
| & Nu = | ||
| k |
| h = | ||
| d |
| = | ||
| 25 × 10-3 |
| = 4613.66 | ||
| m²K |
