Water flows through a tube of diameter 25 mm at an average

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 Re^0.8 Pr^0.4, the convective heat transfer coefficient (inW/m²K) is _______

Re =	ρvd
	μ

=	1000 × 1 × 25 × 10³
	7.25 × 10^-4

= 34482.75
Pr = 4.85
Nu = 0.023 Re^0.8 Pr^0.4.
Nu = .0.23 × (34482.758)^0.8 (4.85)^0.4.
= 184.546

&Nu =	hd
	k

h =	Nu.k
	d

=	184.546 × 0.625
	25 × 10^-3

= 4613.66	W
	m²K

4213.66	W
	m²K