The observation that will be noticed in transferring heat by changing the intermediate cross sectional area is that;
An increase in the intermediate cross sectional area would lead to an increase in the rate of heat transfer and vice versa.
- According to fourier's equation for heat conduction, the rate of heat transfer is given by the equation;
dQ/dt = kA(dT/dx)
Where;
dQ/dt is rate of heat transfer
k is thermal conductivity of the medium
A is cross sectional area
dT/dx is the rate of change of the temperature per unit length
- Now, from the above equation, we can see that the rate of heat transfer is directly proportional to the cross sectional area of the material through which the heat is being conducted.
- This means that the wider the cross sectional area, the more the surface particles required to conduct heat and definitely the higher the rate of heat transfer.
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