Steady state heat flow implies
Consider the following statements:
The Fourier heat conduction equation presumes
1. Steady state conditions
2. Constant value of thermal conductivity
3. Uniform temperature at the wait surfaces
4. One  dimensional heat flow.
Which of these statements are correct?
k may be constant or vary.
The heat conducted through a wall of thickness δ is given by
Which amongst the following is not valid pertaining to above equation?
One end of iron rod of crosssectional area A and length L is kept in a steambath. After same time steady state conditions prevail and Q unit of heat per second passes through any cross section of the rod. The heat flow rate will be adversely affected if
Match the List1 (Coordinate system) with ListII (Steady state governing equation) the following:
Temperature distribution in a cylindrical rod with heat generation is given by
The Fourier law of heat conduction is valid for
While deriving Fourier law of heat conduction some assumptions are made, which are
1. Steadystate condition
2. Onedirectional heat transfer
3. No heat generation
4. Material is homogeneous and isotropic
Fourier law of heat conduction is given by
where
I = thickness of the slab
dT = temperature difference
In this term l/kA is given by
In case of plane slab
Heat transfer by conduction through hollow cylinder is given by
From Fourier law of heat conduction
For hollow cylinder
Heat transfer by conduction through sphere is given by
From Fourier law of heat conduction
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