Transient conduction means
Which of the following statements is not correct?
In a transient flow process
Assumption: Change in internal energy of the billet during time
dt = Net heat flow from the billet to the bath or air during time dt
Lumped parameter analysis for transient heat conduction is essentially valid for
Which of the following changes in temperature during unsteady state follow a periodic variation?
Lumped parameter analysis of transient heat conduction in solid stipulates
1. infinite thermal conductivity.
2. negligible temperature gradient i.e., practically uniform temperature within the solid.
3. small conduction resistance.
4. predominance of convective resistance
Which of the above statements are valid ?
Which of the followings is wrong value of characteristic length l which appears in the Biot number hl/k cand the Fourier number αζ / l2 ?
b and h >> δ
∴ l = δ/2
The temperature distribution during transient heat conduction in a solid does not depend upon
The curve for unsteady state cooling or heating of bodies is
In unsteady state heat conduction the two significant dimensionless parameter used are
In case of unsteady state conduction
A copper block and an air mass block having similar dimensions are subjected to symmetrical heat transfer from one face of each block will reach to the same temperature at a rate
Since thermal conductivity of copper is far greater than air.