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Mechanical Engineering · Q149

Heat And Mass Transfer

Engineering and GATE · Mechanical Engineering · question 149

Q149

Fourier's law of heat conduction is valid for

A.
One dimensional cases only
Answer
B.
Two dimensional cases only
C.
Three dimensional cases only
D.
Regular surfaces having non-uniform temperature gradients

Answer: Option A

Solution

Answer: Option A
Solution:
Fourier's law of heat conduction is valid for One dimensional cases only
Fourier equation is valid for all matter solid, liquid or gas. The vector expression indicating that heat flow rate is normal to an isotherm and is in the direction of decreasing temperature.
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