Question

The material through which convection is possible, is:
(a) glass
(b) copper
(c) aluminium
(d) water​

Answer 1

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Answer 2

The material through which convection is possible is (d) water​

(d) water​: Water is considered the natural convection, Temperature differences affect the density of the fluid, which affects its relative buoyancy. The heavier components will fall, while the lighter components will rise,

Explanation for incorrect answer

(a) glass: In a tempering furnace, contact heat transfer and about 46% of the radiation affect glass surfaces, causing heat to be conducted deeper into the glass. It cannot allow materials for convection.

(b) copper: The heat transfer coefficient is approximately (60-65) w/m2.K and (55-60) w/m2.K, respectively and it is considered forced convection. It cannot allow materials for convection.

(c) aluminum: The heat transfer coefficient for aluminum in forced convection was found to be between (59-64)w/m2.K and an air velocity of 3 m/s. It cannot allow materials for convection.

Hence, Water is the material through which convection is possible.