Question
A steam pipe 50 mm diameter and 2.5 m long has been placed horizontally and exposed to still air at 25 degree Celsius. If the pipe wall temperature is 295 degree Celsius, find out the Grashof number. At the mean temperature difference of 160 degree Celsius, the thermo-physical properties of air are
k =3.64 * 10⁻² W/m K
v =30.09 * 10⁻⁶ m²/s
P ᵣ =0.682
Β =1/160 + 273 = 2.31 * 10⁻³ per K
k =3.64 * 10⁻² W/m K
v =30.09 * 10⁻⁶ m²/s
P ᵣ =0.682
Β =1/160 + 273 = 2.31 * 10⁻³ per K
Answer: Option B
Answer: (b).0.8447 * 10 ⁶
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Answer: (b).0.8447 * 10 ⁶
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