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Diffusion-in-Solids-and-Molecular-Diffusion-in-Fluids

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 pipe wall temperature is 295 degree Celsius, determine rate of heat loss. At mean temperature difference of 160 degree Celsius, rmo-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


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A spherical heater of 20 cm diameter and at 60 degree Celsius is immersed in a tank of water at 20 degree Celsius. Determine the value of convective heat transfer coefficient

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 pipe wall temperature is 295 degree Celsius, determine rate of heat loss. At mean temperature difference of 160 degree Celsius, rmo-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

Consider the above problem, find out the Grashof number

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

determine the rate of heat loss. 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

Diffusion in Solids and Molecular Diffusion in Fluids

Mass-Transfer