Chapter 1 serves as a comprehensive introduction to the captivating field of heat transfer, exploring the fundamental principles, concepts, and modes of heat transfer. The document delves into the significance of heat transfer in various engineering and scientific applications, from everyday life t...
Forsberg Heat Transfer
Chapter 1
Introduction to Heat Transfer
Modes of Heat Transfer
Conduction, Convection, Radiation
Conduction
Heat transfer through solids and non-moving liquids
and gases
Rate of heat transfer is proportional to the temperature
gradient in the material
1
, qn T
An n
n = direction of heat flow
qn = rate of heat flow in n direction
T = temperature
An = cross section area through which heat flows
qn T
Fourier’s Law = −k
An n
k = thermal conductivity
q
Heat flux =
A
q T
In x direction: = − k
A x x
q T
Similarly, = − k
A y y
q T
= − k
A z z
2
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