Chemical Engineering - Heat Transfer - Discussion
Discussion Forum : Heat Transfer - Section 8 (Q.No. 43)
43.
A long iron rod initially at a temperature of 20°C has one end dipped in boiling water (100°C) at time, t = 0. The curved surface of the rod is insulated so that heat conduction is one dimensional in the axial direction. The temperature at a distance 100 mm from the dipped end becomes 40°C at time, t = 200 s. The same temperature is achieved at a distance of 200 mm from the dipped end at time
Discussion:
2 comments Page 1 of 1.
Dhruv said:
9 years ago
Can anyone please explain it clearly?
Moumita said:
3 years ago
Equate fouriers no :
(α*t )/ L^2 = (α *t2) /Lc^2.
t /(200)^2 = 200/(100)^2.
t = 800 s.
(α*t )/ L^2 = (α *t2) /Lc^2.
t /(200)^2 = 200/(100)^2.
t = 800 s.
(4)
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