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Mechanical Engineering · Q41

Heat And Mass Transfer

Engineering and GATE · Mechanical Engineering · question 41

Q41

Unit of thermal diffusivity is

A.
m2/hr
Answer
B.
m2/hr °C
C.
kcal/m2 hr
D.
kcal/m hr °C

Answer: Option A

Solution

Answer: Option A
Solution:
Thermal diffusivity. In heat transfer analysis, thermal diffusivity is the thermal conductivity divided by density and specific heat capacity at constant pressure.
It measures the rate of transfer of heat of a material from the hot end to the cold end.
It has the SI derived unit of m2/hr.
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